CN104813111B - Conditioner - Google Patents

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Publication number
CN104813111B
CN104813111B CN201280077384.6A CN201280077384A CN104813111B CN 104813111 B CN104813111 B CN 104813111B CN 201280077384 A CN201280077384 A CN 201280077384A CN 104813111 B CN104813111 B CN 104813111B
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CN
China
Prior art keywords
thermal medium
heat exchanger
refrigerant
pump
heat
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Active
Application number
CN201280077384.6A
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Chinese (zh)
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CN104813111A (en
Inventor
本村祐治
岛本大祐
本多孝好
森本修
西冈浩二
小野达生
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
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Publication of CN104813111A publication Critical patent/CN104813111A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/0272—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using bridge circuits of one-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02743—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using three four-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/13—Pump speed control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A kind of conditioner (100), multiple pumps (31) all operate, when being turned into using the heat exchange amount of side heat exchanger (35) below the lower limit capacity for the thermal capacity that can be conveyed in thermal medium circulation loop (B), before at least 1 in making multiple pumps (31) stops, the refrigerant side stream for making to be connected to heat exchanger (25) between the thermal medium of pump (31) that stops is closed, then, at least 1 in multiple pumps (31) is set to stop, using the remainder of multiple pumps (31) necessary thermal capacity is conveyed to using side heat exchanger (35).

Description

Conditioner
Technical field
The present invention relates to suitable for the conditioner such as mansion central air-conditioning.
Background technology
In the past, in the conditioners such as mansion central air-conditioning, refrigerant is in warm of the example such as disposed in building beyond the region of objective existence Source machine is outdoor unit and configures the circulation between the indoor indoor unit of building.Moreover, refrigerant radiating, heat absorption, lead to Heated, cooling air is crossed to carry out the refrigeration of air-conditioning object space or heat.Used as such conditioner Refrigerant, mostly use such as HFC (HFC) class refrigerant.In addition, it is also proposed using carbon dioxide (CO2) etc. it is natural Refrigerant.
In addition, in the conditioner of cold is referred to as, using configuration in the heat source machine of building beyond the region of objective existence, generating cold energy Or heat energy.Moreover, being heated, being cooled down to water, anti-icing fluid etc. using heat exchanger of the configuration in outdoor unit, and it is transported to Indoor unit is fan coil unit, baffle heater etc. to be freezed or heated (for example, referring to patent document 1).
Match somebody with somebody in addition, being connected with 4 water in the device for being referred to as heat extraction reclaiming type cold, between heat source machine and indoor unit Pipe, while supply cooling, warmed-up water etc., indoors in unit can unrestricted choice freeze or heat (for example, referring to patent Document 2).
In addition, there is the device constituted as follows, i.e. the heat exchanger of 1 refrigerant and 2 refrigerants is configured each Near indoor unit, 2 refrigerants are transported to indoor unit (for example, referring to patent document 3).
In addition, there is the device constituted as follows, i.e. between outdoor unit and the branch units of heat exchanger with 2 Pipe arrangement is connected, and 2 refrigerants are transported into indoor unit (for example, referring to patent document 4).
In addition, in the conditioners such as mansion central air-conditioning, there is a kind of conditioner, make refrigerant from Outdoor unit is recycled to repeater, the thermal mediums such as water is recycled to indoor unit from repeater, thus, makes the thermal mediums such as water indoors While unit is circulated, reduce the conveying power of thermal medium (for example, referring to patent document 5).
Prior art literature
Patent document
Patent document 1:Japanese Unexamined Patent Publication 2005-140444 publications (page 4, Fig. 1 etc.)
Patent document 2:Japanese Unexamined Patent Publication 5-280818 publications (the 4th, page 5, Fig. 1 etc.)
Patent document 3:Japanese Unexamined Patent Publication 2001-289465 publications (page 5~8, Fig. 1, Fig. 2 etc.)
Patent document 4:Japanese Unexamined Patent Publication 2003-343936 publications (page 5, Fig. 1)
Patent document 5:WO10/049998 publications (page 3, Fig. 1 etc.)
In the conditioners such as conventional mansion central air-conditioning, due to making refrigerant circulation to indoor unit, institute Interior etc. may be leaked to refrigerant.On the other hand, in the conditioner that patent document 1 and patent document 2 are recorded, Refrigerant does not pass through indoor unit.But, it is necessary to build in the conditioner that patent document 1 and patent document 2 are recorded Build in the heat source machine of beyond the region of objective existence, thermal medium is heated or cooled and is conveyed to indoor unit side.Thus, the circulating path of thermal medium becomes It is long.When here, by the way that the heat of work is heated or cooled as defined in thermal medium conveying progress, the energy caused by conveying power etc. Consumption become higher than refrigerant.Thus, when circulating path is elongated, conveying power becomes very large.Thus, in air adjustment In device, as long as the circulation of thermal medium can be advantageously controlled, it becomes possible to realize energy-conservation.
In the conditioner that patent document 2 is recorded, for that can select to freeze or heat by each indoor unit, from Outside must connect 4 pipe arrangements to interior, and application property is poor., it is necessary in room in the conditioner that patent document 3 is recorded 2 medium circulation components such as pump are separately provided in interior unit, not only system becomes expensive, and noise also becomes big, impracticable.And And, heat exchanger is in the vicinity of indoor unit, so that refrigerant can not be excluded in the possibility close to indoor place leakage.
In the conditioner that patent document 4 is recorded, 1 refrigerant after heat exchange and 1 system before heat exchange Cryogen flows into identical stream, so that in the case where being connected to multiple indoor units, each indoor unit can not play maximum energy Power, as the structure for wasting energy.In addition, the connection of branch units and extension pipe arrangement needs refrigeration 2, heats 2 total 4 Pipe arrangement, as a result, as the structure similar with the system that outdoor unit and branch units are connected by 4 pipe arrangements, as application property The system of difference.
In the conditioner that patent document 5 is recorded, unitary system cryogen or near-azeotrope refrigerant are regard as refrigerant Have no problem, but in the case that mixed non-azeotropic refrigerant is used as refrigerant, refrigerant-heat is situated between during situation about using Between matter heat exchanger as evaporator in use, due to the saturated solution temperature and the thermograde of saturated gas temperature of refrigerant, water It may freeze Deng thermal medium.
In addition, in patent document 5, in the case that thermal medium is by refrigerant heat, using thermal medium transfer member, for The indoor unit of carry out heating operation in the indoor unit connected conveys heated thermal medium.In addition, thermal medium is made In the case that cryogen is cooled down, using thermal medium transfer member, for the room of the progress cooling operation in the indoor unit that is connected The cooled thermal medium of interior unit transportation.Therefore, carrying out cooling operation using such refrigerant and thermal medium or heating fortune , it is necessary to as cooling thermal capacity transfer member, heat thermal medium conveying device with thermal capacity transfer member on the basis of turning, Cooling operation or heating operation can be proceeded by the work of thermal medium conveying device.
Moreover, in patent document 5, in the case that the load of the indoor unit connected is fully small, also using Thermal medium transfer member, continues to convey the thermal medium being heated or cooled.Thus, also in the presence of by thermal medium flow more than necessity To the situation of the indoor unit conveying connected.
Thermal medium more than necessity is transported to connected indoor unit as a result, in connecting pipings or indoor unit The flow velocity of the thermal medium of internal flow, which remains continuously, to be made to be formed more than the flow velocity that the oxidation overlay film inside pipe arrangement is peeled off.It is tied Really, the pitting of pipe arrangement may be caused.
Connected indoor unit filled in addition, thermal medium more than necessity is transported to as a result, being conveyed by thermal medium The amount that the consumption of the driving power of generation is assumed beyond script is put, as a result, the consumption electric power of system can become too much.
Thus, in conditioner, in the case that the load of the indoor unit connected is fully small, as long as can enter Exercise 1 in multiple thermal medium conveying devices stop and by other thermal medium conveying devices proceed cooling operation, The control of heating operation, it becomes possible to reduce the risk of pipe arrangement pitting caused by the flow velocity increase in conditioner, and energy It is enough maintain by the number of units subduction zone of thermal medium conveying device Lai energy saving.
The content of the invention
The present invention researches and develops to solve above-mentioned problem, the purpose is to provide a kind of conditioner, and it has many Platform thermal medium conveying device, under single operation mode, in the case that the load of indoor unit is fully small, also can By the control of many thermal medium conveying devices, energy saving, security are improved.
The conditioner of the present invention has：Refrigerant circulation loop, the refrigerant circulation loop is by refrigerant Pipe arrangement connects the refrigerant side stream of heat exchanger between compressor, heat source side heat exchanger, multiple throttling arrangements, multiple thermal mediums, cut Multiple cold-producing medium stream circuit switching devices of refrigerant circulating path are changed, make heat source side refrigerant circulation；Thermal medium is circulated Loop, the thermal medium circulation loop is that heat exchanger is corresponding between the multiple thermal medium respectively by the connection of thermal medium conveying pipe arrangement Multiple thermal medium conveying devices that ground is set, multiple utilization sides heat exchanger, between the multiple thermal medium heat exchanger thermal medium side Stream, circulate thermal medium, between the thermal medium in heat exchanger, the heat source side refrigerant and the thermal medium enter Row heat exchange, in the conditioner, is all operated in the multiple thermal medium conveying device, the utilization side heat exchange When the heat exchange amount of device is turned into below the lower limit capacity for the thermal capacity that can be conveyed in the thermal medium circulation loop, making State before at least 1 stopping in multiple thermal medium conveying devices, make to be connected to the thermal medium conveying device to be stopped The refrigerant side stream of heat exchanger is closed between the thermal medium, then, makes at least 1 in the multiple thermal medium conveying device Stop, the thermal capacitance needed for being conveyed using the remainder in the multiple thermal medium conveying device to utilization side heat exchanger Amount.
The effect of invention
According to the conditioner of the present invention, in the case that the load of connected indoor unit is fully small, make hot Jie Matter conveying device part stops, thereby, it is possible to cut down the driving power of thermal medium conveying device.In addition, can avoid with many Thermal medium feed flow is excessive caused by the thermal medium conveying of individual thermal medium conveying device, as a result, can avoid by thermal medium Flow increase caused by pipe arrangement pitting risk, it is possible to increase energy saving, security.
Brief description of the drawings
Fig. 1 is the synoptic diagram of the setting example for the conditioner for representing embodiments of the present invention.
Fig. 2 is the summary loop structure of one of the loop structure for the conditioner for representing embodiments of the present invention Figure.
Refrigerant flowing when Fig. 3 is the full heating mode of operation for the conditioner for representing embodiments of the present invention Refrigerant loop figure.
Refrigerant flowing when Fig. 4 is the full cooling operation pattern for the conditioner for representing embodiments of the present invention Refrigerant loop figure.
Refrigeration when Fig. 5 is the cooling and warming mixing operation mode for the conditioner for representing embodiments of the present invention The refrigerant loop figure of agent flowing.
Make 1 pump not when Fig. 6 is the full cooling operation pattern for the conditioner for representing embodiments of the present invention The refrigerant loop figure of refrigerant flowing and thermal medium flowing during work.
Make 1 pump not when Fig. 7 is the full cooling operation pattern for the conditioner for representing embodiments of the present invention The refrigerant loop figure of refrigerant flowing and thermal medium flowing during work.
Make 1 pump not when Fig. 8 is the full heating mode of operation for the conditioner for representing embodiments of the present invention The refrigerant loop figure of refrigerant flowing and thermal medium flowing during work.
Make 1 pump not when Fig. 9 is the full heating mode of operation for the conditioner for representing embodiments of the present invention The refrigerant loop figure of refrigerant flowing and thermal medium flowing during work.
The fortune of pump when Figure 10 is pump rotation operating control 1,2 for the conditioner for representing embodiments of the present invention The flow chart of the flow of the hand-off process of turntable number.
The fortune of pump when Figure 11 is pump rotation operating control 3,4 for the conditioner for representing embodiments of the present invention The flow chart of the flow of the hand-off process of turntable number.
Figure 12 is single in junction chamber under each operation mode in the conditioner for represent embodiments of the present invention In the case that the load of member is small, make 1 pump stop in the case of refrigerant circulation loop and thermal medium circulation loop action Table.
Figure 13 be connection indoor unit load it is small in the case of, for using 2 pumps come in the case of reducing flow Driving power change and the line chart that the change of the driving power in the case of flow is compared is reduced using 1 pump.
Embodiment
Hereinafter, based on brief description of the drawings embodiments of the present invention.
Fig. 1 is the synoptic diagram of the setting example for the conditioner for representing embodiments of the present invention.Illustrate empty based on Fig. 1 The setting example of gas control device.The conditioner by using make refrigerant (heat source side refrigerant, thermal medium) circulate Kind of refrigeration cycle (refrigerant circulation loop A, thermal medium circulation loop B), each indoor unit being capable of unrestricted choice as operation mode Refrigeration mode or heating mode.In Fig. 1, the whole of the conditioner that is connected to many indoor units 3 is schematically illustrated Body.In addition, including Fig. 1, in figures in the following, the relation of the size of each component parts is sometimes different from actual conditions.
In Fig. 1, the conditioner of present embodiment have outdoor unit (heat source machine) 1, many indoor units 3 with And every 1 relay unit 2 being located between outdoor unit 1 and indoor unit 3.Relay unit 2 utilizes heat source side refrigerant and heat Medium carries out heat exchange.Outdoor unit 1 and relay unit 2 are by being connected the refrigerant piping 4 that heat source side refrigerant is turned on. Relay unit 2 and indoor unit 3 are by being connected the pipe arrangement (thermal medium pipe arrangement) 5 that thermal medium is turned on.Moreover, by outdoor unit The cold energy or heat energy of 1 generation are transported to indoor unit 3 by relay unit 2.
Outdoor unit 1 is generally configured in space (for example, roof etc.) the i.e. exterior space 6 outside the building 9 of mansion etc., And cold energy or heat energy are supplied to indoor unit 3 by relay unit 2.Indoor unit 3 is configured in can be to the inside of building 9 Space (for example, interior etc.) be that the interior space 7 supplies cooling air or heats position with air, and to as air-conditioning pair The interior space 7 of image space, which supplies cooling air or heated, uses air.Relay unit 2 is as single with outdoor unit 1 and interior First 3 independent frameworks, can be arranged on the positions different from the exterior space 6 and the interior space 7, and by refrigerant piping 4 and Pipe arrangement 5 is connected with outdoor unit 1 and indoor unit 3 respectively, the cold energy or heat energy that are supplied from outdoor unit 1 is delivered to indoor single Member 3.
Briefly describe the work of the conditioner of embodiments of the present invention.
Heat source side refrigerant is transported to relay unit 2 from outdoor unit 1 by refrigerant piping 4.The thermal source conveyed Between thermal medium of the side refrigerant in relay unit 2 heat is carried out in heat exchanger (heat exchanger 25 between thermal medium described later) with thermal medium Exchange, thermal medium is heated or cooled.That is, between thermal medium in heat exchanger, producing hot water or cold water.Because of relay unit 2 The hot water or cold water of generation are transported to indoor unit 3 by thermal medium conveying device (pump 31 described later) via pipe arrangement 5, in room It is used for the heating operation (as long as needing the operating condition of hot water) or cooling operation to the interior space 7 in interior unit 3 (as long as the operating condition for needing cold water).
As heat source side refrigerant, the unitary system cryogen such as R-22, R-134a, R-32, R-410A, R- can be used CF containing double bond in the near azeotropic mixed refrigerants such as 404A, the mixed non-azeotropic refrigerant such as R-407C, chemical formula3cF=CH2Deng The refrigerant or its mixture of the less value of global warming coefficient, or CO2Or the natural refrigerant such as propane.
On the other hand, as thermal medium, such as mixed liquor of water, anti-icing fluid, water and anti-icing fluid, water and anti-corrosion can be used Lose high mixed liquor of additive of effect etc..
As shown in figure 1, in the conditioner of present embodiment, outdoor unit 1 and relay unit 2 use 2 systems Cryogen pipe arrangement 4, relay unit 2 and each indoor unit 3 are connected respectively using 2 pipe arrangements 5.Like this, in present embodiment Conditioner in, use 2 pipe arrangements (refrigerant piping 4, pipe arrangement 5) connection each unit (outdoor unit 1, indoor unit 3 And relay unit 2), thus, construction becomes easy.
In addition, in Fig. 1, the inside of building 9 is arranged on but different from the interior space 7 exemplified with relay unit 2 Space is the state in the space (hereinafter referred to as space 8) of ceiling inboard etc..Therefore, relay unit 2 can be arranged in ceiling Beyond side, can also be arranged on beyond living space, as long as with the space that can be ventilated outside room, any position can also be arranged on Put, space ventilated outside the shared space and room such as there is elevator etc..In addition, relay unit 2 can also be disposed in the outdoor The vicinity of unit 1.But, when the distance from relay unit 2 to indoor unit 3 is long, the conveying power of thermal medium becomes suitable Greatly, so as to need to pay attention to the situation of energy-saving effect variation.
In Fig. 1, the situation of the exterior space 6, but not limited to this are arranged on exemplified with outdoor unit 1.For example, outdoor single Member 1 can also be arranged on the besieged space such as Machine Room with ventilation mouth, as long as can using blast pipe by used heat to Building 9 is outer to be vented, and can also be arranged on the inside of building 9, or, in the case of using water-cooled outdoor unit 1, The inside of building 9 can also be arranged on.Even if outdoor unit 1 is arranged on into such place, will not also occur particularly to ask Topic.
In Fig. 1, it is the situation of ceiling boxlike exemplified with indoor unit 3, but is not so limited, it would however also be possible to employ ceiling is embedded in Formula or ceiling suspension type etc., as long as can be heated directly or by pipeline etc. to the blowout of the interior space 7 with air or cooling sky Gas, can use any kind.
Moreover, the connection number of units of outdoor unit 1, indoor unit 3 and relay unit 2 is not limited to the number of units shown in Fig. 1, with setting The building 9 for having put the conditioner of present embodiment correspondingly determines number of units.
, can be by many relay units 2 dispersedly in the case of connecting many relay units 2 for 1 outdoor unit 1 The space in the shared space or ceiling inboard that are arranged in the building of mansion etc. etc..Thus, the thermal medium in each relay unit 2 Between heat exchanger can undertake air conditioner load.In addition, the thermal medium conveying that indoor unit 3 can be arranged in each relay unit 2 Distance or height in the conveying allowed band of device, and can integrally be configured for the building of mansion etc..
Fig. 2 is the loop structure for the conditioner (hereinafter referred to as conditioner 100) for representing present embodiment The summary loop structure figure of one.Based on Fig. 2, the structure on conditioner 100, that is to say, that constitute refrigerant and return The effect of each drive member on road is described in detail.As shown in Fig. 2 outdoor unit 1 and relay unit 2 are via relay unit 2 Heat exchanger (refrigerant-water- to-water heat exchanger) between heat exchanger (refrigerant-water- to-water heat exchanger) 25a and thermal medium between the thermal medium being had 25b is connected by refrigerant piping 4.In addition, relay unit 2 and indoor unit 3 are between thermal medium between heat exchanger 25a and thermal medium Heat exchanger 25b is connected by pipe arrangement 5.In addition, being discussed in detail below on refrigerant piping 4 and pipe arrangement 5.
[outdoor unit 1]
In outdoor unit 1, the cold-producing medium stream circuit switching device 11 of compressor 10, four-way valve etc. the 1st, heat source side heat exchanger 12 It is connected in series and is carried by refrigerant piping 4 with memory 19.In addition, in outdoor unit 1, being provided with refrigerant and being matched somebody with somebody with connection Pipe 4a, refrigerant connecting pipings 4b, check-valves 13a, check-valves 13b, check-valves 13c and check-valves 13d.By setting refrigeration Agent connecting pipings 4a, refrigerant connecting pipings 4b, check-valves 13a, check-valves 13b, check-valves 13c and check-valves 13d, nothing It is which kind of operating by the operating required by indoor unit 3, can flows into the heat source side refrigerant of inflow relay unit 2 For constant direction.
Compressor 10 sucks heat source side refrigerant, compresses state of the heat source side refrigerant as HTHP and to system Refrigerant cycle loop A is conveyed, and is constituted by such as the frequency-changeable compressor for being capable of control capability.1st refrigerant flow path switches The stream of heat source side refrigerant during the switching heating operation of device 11 (during full heating mode of operation and when heating main body operation mode) The flow direction of the heat source side refrigerant of when main body operation mode (during full cooling operation pattern and refrigeration) during to cooling operation.
Heat source side heat exchanger 12, as evaporator function, condenser is used as in cooling operation in heating operation (or radiator) function, in the fluid and heat source side refrigerant of the air of blower fan supply from the fan for omitting diagram etc. etc. Between carry out heat exchange, make the heat source side refrigerant evaporation gasification or condensation liquefaction.Memory 19 is arranged on compressor 10 Suction side, accumulates different residual refrigerants produced during because of heating operation and during cooling operation or for transitionality operating The residual refrigerant of change.
Check-valves 13c is arranged on the refrigerant piping 4 between the cold-producing medium stream circuit switching device 11 of relay unit 2 and the 1st, Only allow the flowing of the heat source side refrigerant of prescribed direction (from relay unit 2 to the direction of outdoor unit 1).Check-valves 13a quilts Be arranged on the refrigerant piping 4 between heat source side heat exchanger 12 and relay unit 2, only allow prescribed direction (from outdoor unit 1 to The direction of relay unit 2) heat source side refrigerant flowing.Check-valves 13d is arranged on refrigerant connecting pipings 4a, in system During heat run, make to circulate to relay unit 2 from the heat source side refrigerant that compressor 10 is discharged.Check-valves 13b is arranged on refrigeration Agent connecting pipings 4b, suction effluent of the heat source side refrigerant returned when making heating operation from relay unit 2 to compressor 10 It is logical.
Refrigerant connecting pipings 4a is used for the 1st cold-producing medium stream circuit switching device 11 of connection and non-return in outdoor unit 1 The refrigerant piping 4 between refrigerant piping 4 and check-valves 13a and relay unit 2 between valve 13c.Refrigerant is matched somebody with somebody with connection Pipe 4b is used for the refrigerant piping 4 and heat source side heat exchanger between connection check-valves 13c and relay unit 2 in outdoor unit 1 Refrigerant piping 4 between 12 and check-valves 13a.In addition, in fig. 2, exemplified with being provided with refrigerant connecting pipings 4a, system Cryogen connecting pipings 4b, check-valves 13a, check-valves 13b, check-valves 13c and check-valves 13d situation, but be not so limited, Not necessarily it must be provided with.
[indoor unit 3]
It is equipped with respectively in unit 3 indoors and utilizes side heat exchanger 35.This passes through pipe arrangement 5 and relaying using side heat exchanger 35 The thermal medium flow passage selector device 33 of thermal medium flow adjuster 34 and the 2nd of unit 2 is connected.This using side heat exchanger 35 make from Heat exchange is carried out between the air and thermal medium that omit the blower fan supply of the fan of diagram etc., is generated for being supplied to the interior space 7 That gives heats with air or cooling air.
In the Fig. 2, situation about being connected exemplified with 4 indoor units 3 with relay unit 2, with room since paper upside Interior unit 3a, indoor unit 3b, indoor unit 3c and indoor unit 3d order are shown.In addition, with indoor unit 3a ~indoor unit 3d correspondingly, using side heat exchanger 35 also on the upside of the paper to be exchanged heat using side heat exchanger 35a, using side Device 35b, it is shown using side heat exchanger 35c and using side heat exchanger 35d order.In addition, in the same manner as Fig. 1, it is indoor The connection number of units of unit 3 is not limited to 4 shown in Fig. 2.
[relay unit 2]
Be equipped with relay unit 2 heat exchanger 25 between thermal medium more than at least two, 2 throttling arrangements 26,2 open Close device (opening and closing device 27, opening and closing device 29), 2 the 2nd cold-producing medium stream circuit switching devices 28,2 thermal medium conveying devices (with Be referred to as pump 31 down), 4 the 1st thermal medium flow passage selector device 32,4 the 2nd thermal medium flow passage selector devices 33 and 4 thermal mediums Flow adjuster 34.
Heat exchanger 25 (heat exchanger 25b between heat exchanger 25a, thermal medium between thermal medium) is for carrying out between 2 thermal mediums As condenser (radiator) function during 3 heat supply of indoor unit of heating operation, and for carrying out cooling operation The supply cold energy of indoor unit 3 when as evaporator function, heat source side refrigerant and thermal medium is carried out heat exchange, will be by The cold energy or heat energy that are stored in heat source side refrigerant of the generation of outdoor unit 1 are transmitted to thermal medium.Heat exchanger 25a quilts between thermal medium Between the throttling arrangement 26a and the 2nd cold-producing medium stream circuit switching device 28a that are arranged in refrigerant circulation loop A, in cooling and warming Cooling during mixing operation mode for thermal medium.In addition, heat exchanger 25b is arranged on refrigerant circulation loop A between thermal medium In throttling arrangement 26b and the 2nd cold-producing medium stream circuit switching device 28b between, in cooling and warming mixing operation mode be used for heat The heating of medium.
2 throttling arrangements 26 (throttling arrangement 26a, throttling arrangement 26b) have the function as pressure-reducing valve or expansion valve, make Heat source side refrigerant puffing.Heat is arranged in the flowing of heat source side refrigerants of the throttling arrangement 26a in cooling operation Heat exchanger 25a upstream side between medium.It is arranged in the flowing of heat source side refrigerants of the throttling arrangement 26b in cooling operation Heat exchanger 25b upstream side between thermal medium.2 throttling arrangements 26 can aperture changeably control, by such as electronic expansion valve Deng composition.
The structures such as magnetic valve of 2 opening and closing devices (opening and closing device 27, opening and closing device 29) by work can be opened and closed by being powered Into for being opened and closed refrigerant piping 4.That is, 2 opening and closing devices control opening and closing to switch heat source side system according to operation mode The stream of cryogen.Opening and closing device 27 is arranged on (the connection outdoor unit 1 of refrigerant piping 4 of the entrance side of heat source side refrigerant With the refrigerant piping 4 positioned at paper most subordinate in the refrigerant piping 4 of relay unit 2).Opening and closing device 29 is arranged on pair Pipe arrangement (the bypass pipe that the refrigerant piping 4 of the entrance side of heat source side refrigerant and the refrigerant piping 4 of outlet side are attached 20)., can also in addition, as long as opening and closing device 27, opening and closing device 29 can carry out the part of the switching of refrigerant flow path Using can changeably control the part of aperture such as electronic expansion valve.
2 the 2nd cold-producing medium stream circuit switching devices 28 (the 2nd cold-producing medium stream circuit switching device 28a, the switchings of the 2nd refrigerant flow path Device 28b) by being constituted such as four-way valve, according to operation mode, heat exchanger 25 is sent out as condenser or evaporator between thermal medium Wave and act on switching the flowing of heat source side refrigerant.Heat source side systems of the 2nd cold-producing medium stream circuit switching device 28a in cooling operation The downstream of heat exchanger 25a between thermal medium is arranged in the flowing of cryogen.2nd cold-producing medium stream circuit switching device 28b is making entirely The downstream of heat exchanger 25b between thermal medium is arranged in the flowing of heat source side refrigerant during blowdown firing pattern.
2 pumps 31 (pump 31a, pump 31b) make the thermal medium turned in pipe arrangement 5 be circulated to thermal medium circulation loop B.Pump 31a is arranged on the pipe arrangement 5 between heat exchanger 25a and the 2nd thermal medium flow passage selector device 33 between thermal medium.Pump 31b is set Pipe arrangement 5 between thermal medium between heat exchanger 25b and the 2nd thermal medium flow passage selector device 33.2 pumps 31 are by can for example control Pump of capacity etc. is constituted, and its flow can be adjusted by the size of the load in indoor unit 3.
(the thermal medium stream of the 1st thermal medium flow passage selector device 32a~the 1st is cut for 4 the 1st thermal medium flow passage selector devices 32 Changing device 32d) it is made up of triple valve etc., switch thermal medium between heat exchanger 25b between heat exchanger 25a and thermal medium between thermal medium Stream.It (is 4 here that 1st thermal medium flow passage selector device 32, which is provided with number corresponding with the setting of numbers of indoor unit 3, It is individual).One of threeway of 1st thermal medium flow passage selector device 32 heat exchanger 25a between thermal medium is connected, one of threeway and thermal medium Between heat exchanger 25b connections, one of threeway is connected with thermal medium flow adjuster 34, and is arranged on and utilizes side heat exchanger 35 The outlet side of thermal medium stream.Filled in addition, accordingly being switched with indoor unit 3 since paper upside with the 1st thermal medium stream Put 32a, the 1st thermal medium flow passage selector device 32b, the 1st thermal medium flow passage selector device 32c and the 1st thermal medium stream switching dress The order for putting 32d is shown.It is not only another logical complete comprising leading to from one in addition, for the switching of thermal medium stream Switching, also comprising leading to another logical part switching from one.
(the thermal medium stream of the 2nd thermal medium flow passage selector device 33a~the 2nd is cut for 4 the 2nd thermal medium flow passage selector devices 33 Changing device 33d) it is made up of triple valve etc., switch thermal medium between heat exchanger 25b between heat exchanger 25a and thermal medium between thermal medium Stream.It (is 4 here that 2nd thermal medium flow passage selector device 33, which is provided with number corresponding with the setting of numbers of indoor unit 3, It is individual).One of threeway of 2nd thermal medium flow passage selector device 33 heat exchanger 25a between thermal medium is connected, one of threeway and thermal medium Between heat exchanger 25b connections, one of threeway is connected with using side heat exchanger 35, and is arranged on the thermal medium using side heat exchanger 35 The entrance side of stream.In addition, with indoor unit 3 accordingly on the upside of the paper with the 2nd thermal medium flow passage selector device 33a, 2nd thermal medium flow passage selector device 33b, the 2nd thermal medium flow passage selector device 33c, the 2nd thermal medium flow passage selector device 33d Order is shown.In addition, for the switching of thermal medium stream, not only comprising another logical complete switching is led to from one, going back Switch comprising another logical part is led to from one.
4 thermal medium flow adjusters 34 (thermal medium flow adjuster 34a~thermal medium flow adjuster 34d) Two-port valve by that can control aperture area etc. is constituted, and controls the flow of thermal medium flowed to pipe arrangement 5.Thermal medium flow is adjusted Device 34 is provided with number (being 4 here) corresponding with the setting of numbers of indoor unit 3.Thermal medium flow adjuster 34 One it is logical be connected with using side heat exchanger 35, it is another lead to be connected with the 1st thermal medium flow passage selector device 32, and be arranged on and utilize side The outlet side of the thermal medium stream of heat exchanger 35.That is, thermal medium flow adjuster 34 is by flowing into the thermal medium of indoor unit 3 Temperature and outflow thermal medium temperature come adjust flow into indoor unit 3 thermal medium amount, can by with indoor load phase The optimal thermal medium amount answered is supplied to indoor unit 3.
In addition, with indoor unit 3 accordingly since paper upside with thermal medium flow adjuster 34a, thermal medium stream Amount adjusting apparatus 34b, thermal medium flow adjuster 34c and thermal medium flow adjuster 34d order are shown.Separately Outside, thermal medium flow adjuster 34 can also be arranged on to the entrance side of the thermal medium stream using side heat exchanger 35.Moreover, Thermal medium flow adjuster 34 can also be arranged on and be situated between using the heat of entrance side the i.e. the 2nd of the thermal medium stream of side heat exchanger 35 Between mass flow circuit switching device 33 and utilization side heat exchanger 35.Moreover, indoors in unit 3, being closed in stopping or temperature sensor Close etc. when need not load, by making thermal medium flow adjuster 34 fully closed, can stop being situated between to the heat of indoor unit 3 Matter is supplied.
In addition, in the 1st thermal medium flow passage selector device 32 or the 2nd thermal medium flow passage selector device 33, if using additional The part of the function of thermal medium flow adjuster 34, can also omit thermal medium flow adjuster 34.
In addition, being provided with the temperature for detecting the thermal medium of the outlet side of heat exchanger 25 between thermal medium in relay unit 2 The temperature sensor 40 (temperature sensor 40a, temperature sensor 40b) of degree.The information detected by temperature sensor 40 (believe by temperature Breath) be transported to Comprehensive Control conditioner 100 work control device 50, and be used for compressor 10 driving frequency Rate, the rotating speed for omitting the blower fan illustrated, the switching of the 1st cold-producing medium stream circuit switching device 11, the driving frequency of pump 31, the 2nd refrigeration The switching of agent flow passage selector device 28, the control of the switching of the stream of thermal medium, the adjustment of thermal medium flow of indoor unit 3 etc. System.In addition, the state independently carried exemplified with control device 50 and each unit, but it is not so limited, can also can be with outdoor At least one or each unit of unit 1, indoor unit 3 and relay unit 2 are communicatedly carried.
In addition, control device 50 is made up of microcomputer etc., based on the detection information in various detection means and from remote control Instruction, control the driving frequency of compressor 10, rotating speed (including ON/OFF), the 1st cold-producing medium stream circuit switching device 11 of blower fan Switching, the driving of pump 31, the aperture of throttling arrangement 26, the opening and closing of opening and closing device, the 2nd cold-producing medium stream circuit switching device 28 cut Change, the switching of the 1st thermal medium flow passage selector device 32, the switching of the 2nd thermal medium flow passage selector device 33 and thermal medium flow are adjusted Driving of engagement positions 34 etc., each drive member (pump 31, the 1st thermal medium flow passage selector device 32, the 2nd thermal medium stream switching dress Put the driving part of 33, throttling arrangement 26, the 2nd cold-producing medium stream circuit switching device 28 etc.), and implement each operation mode described later Perform and switching from thermal medium stream to thermal medium heat storage tank.
The pipe arrangement 5 of thermal medium is turned on by heat exchanger 25a is connected between thermal medium part and the heat exchanger 25b between thermal medium The part of connection is constituted.Pipe arrangement 5 with and the number of units of indoor unit 3 that is connected of relay unit 2 correspondingly branch (is each 4 points here Branch).Moreover, pipe arrangement 5 is connected the 1st thermal medium flow passage selector device 32 and the 2nd thermal medium flow passage selector device 33.Pass through control The 1st thermal medium flow passage selector device 32 and the 2nd thermal medium flow passage selector device 33 are made, decision makes to come from heat exchanger between thermal medium 25a thermal medium is flowed into still makes the thermal medium inflow of the heat exchanger 25b between thermal medium be changed using side using side heat exchanger 35 Hot device 35.
Moreover, in conditioner 100, connecting compressor 10, the 1st refrigerant flow path using refrigerant piping 4 and cutting Changing device 11, heat source side heat exchanger 12, opening and closing device 27, opening and closing device 29, the 2nd cold-producing medium stream circuit switching device 28, thermal medium Between refrigerant flow path, throttling arrangement 26 and the memory 19 of heat exchanger 25 constitute refrigerant circulation loop A.In addition, using matching somebody with somebody Thermal medium stream, pump 31, the 1st thermal medium flow passage selector device 32, the thermal medium flow of heat exchanger 25 are adjusted between the connection thermal medium of pipe 5 Engagement positions 34, using the thermal medium flow passage selector device 33 of side heat exchanger 35 and the 2nd constitute thermal medium circulation loop B.Namely Say, many using side heat exchanger 35, heat exchanger 25 is connected in parallel between thermal medium respectively, using thermal medium circulation loop B as multiple System.
Therefore, in conditioner 100, outdoor unit 1 and relay unit 2 are via being arranged in relay unit 2 Heat exchanger 25b is connected between heat exchanger 25a and thermal medium between thermal medium, and relay unit 2 and indoor unit 3 are also between thermal medium Heat exchanger 25b is connected between heat exchanger 25a and thermal medium.That is, in conditioner 100, heat exchanger between thermal medium is utilized Heat exchanger 25b makes the heat source side refrigerant circulated in refrigerant circulation loop A and is recycled back in thermal medium between 25a and thermal medium The thermal medium heat exchange circulated in the B of road.By using such structure, conditioner 100 can be realized and indoor load Corresponding optimal cooling operation or heating operation.
[operation mode]
Each operation mode performed on conditioner 100 is illustrated.The conditioner 100 is based on coming from The instruction of each indoor unit 3, can carry out cooling operation or heating operation using its indoor unit 3.That is, air adjustment Device 100 can carry out same operating using whole indoor units 3, and can be utilized respectively indoor unit 3 and carry out different fortune Turn.
In the operation mode that conditioner 100 is performed, there is the indoor unit 3 driven and all perform refrigeration The full cooling operation pattern of operating, the indoor unit 3 driven all perform full heating mode of operation, the refrigeration of heating operation Heat the refrigeration main body operation mode bigger than heating load of the refrigeration load in mixing operation mode and cooling and warming mixing operating In pattern heat duty factor refrigeration load greatly heat main body operation mode.Hereinafter, on each operation mode, with heat source side system The flowing of cryogen and thermal medium is illustrated together.
[full heating mode of operation]
Fig. 3 is the refrigerant loop of the flowing of refrigerant when representing the full heating mode of operation of conditioner 100 Figure.In the Fig. 3, to complete in case of all producing heat energy load using side heat exchanger 35a~utilization side heat exchanger 35d Heating mode of operation is illustrated.In addition, in figure 3, the pipe arrangement shown in thick line represents the pipe arrangement of heat source side refrigerant flowing.Separately Outside, in figure 3, the flow direction of heat source side refrigerant is represented with solid arrow, the flowing side of thermal medium is represented with dotted arrow To.
In the case of full heating mode of operation shown in Fig. 3, in outdoor unit 1, by the 1st cold-producing medium stream circuit switching device 11 switch to the heat source side refrigerant for making to discharge from compressor 10 not via the ground of heat source side heat exchanger 12 inflow relay unit 2. In relay unit 2, it is driven pump 31a and pump 31b, open thermal medium flow adjuster 34a~thermal medium flow adjustment Device 34d, thermal medium respectively between thermal medium between heat exchanger 25a and thermal medium heat exchanger 25b with utilizing side heat exchanger 35a~profit Circulated between the heat exchanger 35d of side.In addition, the 2nd cold-producing medium stream circuit switching device 28a and the 2nd cold-producing medium stream circuit switching device 28b It is switched to and heats side, opening and closing device 27, which turns into, closes, opening and closing device 29, which turns into, is opened.
First, the flowing on the heat source side refrigerant in refrigerant circulation loop A is illustrated.
The refrigerant of low-temp low-pressure is compressed by compressor 10, gaseous refrigerant and discharge as HTHP.From The gaseous refrigerant for the HTHP that compressor 10 is discharged is connected by the 1st cold-producing medium stream circuit switching device 11 in refrigerant Connect in pipe arrangement 4a and turn on, and by check-valves 13d, flowed out from outdoor unit 1.The HTHP flowed out from outdoor unit 1 Gaseous refrigerant flows into relay unit 2 by refrigerant piping 4.Flow into the gaseous refrigerant of the HTHP of relay unit 2 It is branched and by the 2nd cold-producing medium stream circuit switching device 28a and the 2nd cold-producing medium stream circuit switching device 28b, separately flows into thermal medium Between heat exchanger 25b between heat exchanger 25a and thermal medium.
Flow into thermal medium between heat exchanger 25a and thermal medium heat exchanger 25b HTHP gaseous refrigerant to Condensation liquefaction, the liquid refrigerant as high pressure while the thermal medium radiating circulated in thermal medium circulation loop B.From thermal medium Between between heat exchanger 25a and thermal medium heat exchanger 25b flow out liquid refrigerant it is swollen in throttling arrangement 26a and throttling arrangement 26b It is swollen, the two-phase system cryogen as low-temp low-pressure.It is single from relaying by opening and closing device 29 after these two-phase system cryogens interflow Member 2 is flowed out, and outdoor unit 1 is flowed into again by refrigerant piping 4.The refrigerant for flowing into outdoor unit 1 is matched somebody with somebody in refrigerant with connection Turned in pipe 4b, by check-valves 13b, and flow into the heat source side heat exchanger 12 played a role as evaporator.
Moreover, flow into heat source side heat exchanger 12 heat source side refrigerant in heat source side heat exchanger 12 from the exterior space 6 Air (hereinafter referred to as outer gas) absorbs heat, the gaseous refrigerant as low-temp low-pressure.From the low of the outflow of heat source side heat exchanger 12 The gaseous refrigerant of warm low pressure is inhaled into compressor 10 again via the 1st cold-producing medium stream circuit switching device 11 and memory 19.
Now, using the pressure as the heat source side refrigerant that will be flowed between thermal medium between heat exchanger 25 and throttling arrangement 26 Power is converted between the value of saturation temperature and thermal medium and (supercooling is subcooled obtained from the difference of the temperature of the outlet side of heat exchanger 25 Degree) turn into the aperture that constant mode controls throttling arrangement 26.Furthermore it is possible to determine the centre position of heat exchanger 25 between thermal medium Temperature in the case of, can also be used instead and the obtained saturation temperature of conversion has been carried out to the temperature in the centre position.Should In the case of, without setting pressure sensor, it can inexpensively constitute system.
Hereinafter, the flowing on the thermal medium in thermal medium circulation loop B is illustrated.
Under full heating mode of operation, using between thermal medium between heat exchanger 25a and thermal medium heat exchanger 25b both sides by thermal source The heat energy of side refrigerant is delivered to thermal medium, heated thermal medium is flowed in pipe arrangement 5 by pump 31a and pump 31b.By pump The thermal medium that 31a and pump 31b pressurize and flowed out is filled via the switching of the thermal medium stream of the 2nd thermal medium flow passage selector device 33a~the 2nd Put 33d inflows and utilize side heat exchanger 35a~utilization side heat exchanger 35d.Moreover, thermal medium is utilizing side heat exchanger 35a~utilization Radiated in the heat exchanger 35d of side to room air, thus carry out heating for the interior space 7.
Then, thermal medium is from using side heat exchanger 35a~flowed out using side heat exchanger 35d and flowing into the adjustment of thermal medium flow Device 34a~thermal medium flow adjuster 34d.Now, adjusted by thermal medium flow adjuster 34a~thermal medium flow Device 34d effect, the flow of thermal medium is controlled into the flow born needed for indoor necessary air conditioner load and flows into utilization Side heat exchanger 35a~utilization side heat exchanger 35d.From thermal medium flow adjuster 34a~thermal medium flow adjuster 34d streams The thermal medium gone out is flowed between thermal medium by the thermal medium flow passage selector device 32d of the 1st thermal medium flow passage selector device 32a~the 1st Heat exchanger 25b between heat exchanger 25a and thermal medium, and receive to supply to the interior space 7 by indoor unit 3 from refrigerant side this Partial heat, then it is inhaled into pump 31a and pump 31b.
In addition, in the pipe arrangement 5 using side heat exchanger 35, thermal medium is passed through along from the 2nd thermal medium flow passage selector device 33 The direction flowing of the 1st thermal medium flow passage selector device 32 is reached by thermal medium flow adjuster 34.In addition, by will be by temperature The temperature or the temperature that is detected by temperature sensor 40b of sensor 40a detections from the heat flowed out using side heat exchanger 35 with being situated between The temperature difference of matter is controlled with remaining desired value, can bear the necessary air conditioner load of the interior space 7.Changed between thermal medium The outlet temperature of hot device 25 can be with the temperature of any one party in temperature in use sensor 40a or temperature sensor 40b, can also Use their mean temperature.
Now, the 1st thermal medium flow passage selector device 32 and the 2nd thermal medium flow passage selector device 33 are controlled so as to middle aperture Or between thermal medium the corresponding aperture of the heat medium temperature of heat exchanger 25b outlet between heat exchanger 25a and thermal medium, to ensure To the stream that heat exchanger 25b both sides circulate between heat exchanger 25a and thermal medium between thermal medium.In addition, using side heat exchanger 35 originally The temperature difference of Ying Yiqi entrance and exits is controlled, but using the entrance side of side heat exchanger 35 heat medium temperature be with by temperature The temperature identical temperature of sensor 40b detections is spent, by using temperature sensor 40b, the number of temperature sensor can be reduced Amount, inexpensively constitutes system.
When performing full heating mode of operation, because thermal medium need not be to (the bag of utilization side heat exchanger 35 without heat load Include temperature sensor closing) flowing, so closing stream by thermal medium flow adjuster 34, thermal medium is not changed to using side Hot device 35 flows.In figure 3, all there is heat load using side heat exchanger 35a~using side heat exchanger 35d, so as to there is hot Jie Mass flow is moved, but in the case of becoming no heat load, makes corresponding thermal medium flow adjuster 34 fully closed.Moreover, again In the case of secondary generation heat load, open corresponding thermal medium flow adjuster 34 circulates thermal medium.In this regard, In other operation modes illustrated below similarly.
[full cooling operation pattern]
Fig. 4 is the refrigerant loop of the flowing of refrigerant when representing the full cooling operation pattern of conditioner 100 Figure.In the Fig. 4, to complete in case of all producing cold energy load using side heat exchanger 35a~utilization side heat exchanger 35d Cooling operation pattern is illustrated.In addition, in Fig. 4, the pipe arrangement shown in thick line represents the pipe arrangement of heat source side refrigerant flowing.Separately Outside, in Fig. 4, the flow direction of heat source side refrigerant is represented with solid arrow, the flowing side of thermal medium is represented with dotted arrow To.
In the case of full cooling operation pattern shown in Fig. 4, in outdoor unit 1, by the 1st cold-producing medium stream circuit switching device 11 switch to the heat source side refrigerant inflow heat source side heat exchanger 12 for making to discharge from compressor 10.
In relay unit 2, it is driven pump 31a and pump 31b, open thermal medium flow adjuster 34a~heat is situated between Mass flow amount adjusting apparatus 34d, thermal medium between thermal medium between heat exchanger 25a and thermal medium heat exchanger 25b respectively with being changed using side Circulated between hot device 35a~utilization side heat exchanger 35d.In addition, the 2nd cold-producing medium stream circuit switching device 28a and the 2nd refrigerant flow path Switching device 28b is switched to refrigeration side, and opening and closing device 27 is opened, and opening and closing device 29 is closed.
First, the flowing on the heat source side refrigerant in refrigerant circulation loop A is illustrated.
The refrigerant of low-temp low-pressure is compressed by compressor 10, gaseous refrigerant and discharge as HTHP.From The gaseous refrigerant for the HTHP that compressor 10 is discharged is exchanged heat via the 1st cold-producing medium stream circuit switching device 11 by heat source side Device 12, carries out heat exchange, liquid or two-phase system cryogen as HTHP have passed through after check-valves 13a, made with outer gas Cryogen is turned on in connecting pipings 4a, and is flowed out from outdoor unit 1.From outdoor unit 1 flow out HTHP liquid or Two-phase system cryogen flows into relay unit 2 by refrigerant piping 4.
After the liquid or two-phase system cryogen of the HTHP of inflow relay unit 2 are by opening and closing device 27, it is branched And expanded in throttling arrangement 26a and throttling arrangement 26b, the two-phase system cryogen as low-temp low-pressure.These two-phase system cryogens Evaporation gasification, the gaseous refrigerant as low temperature while the thermal medium heat absorption circulated from thermal medium circulation loop B.From heat The gaseous refrigerant that heat exchanger 25b flows out between heat exchanger 25a and thermal medium between medium passes through the 2nd cold-producing medium stream circuit switching device 28a and the 2nd cold-producing medium stream circuit switching device 28b simultaneously flows out from relay unit 2, is turned in refrigerant piping 4, and pass through non-return Valve 13c is inhaled into compressor 10 again via the 1st cold-producing medium stream circuit switching device 11 and memory 19.
Now, using the pressure as the heat source side refrigerant that will be flowed between thermal medium between heat exchanger 25 and throttling arrangement 26 Power is converted between the value of saturation temperature and thermal medium and overheats (degree of superheat) obtained from the difference of the temperature of the outlet side of heat exchanger 25 As constant mode, the aperture of throttling arrangement 26 is controlled.Furthermore it is possible to determine the centre position of heat exchanger 25 between thermal medium In the case of temperature, the saturation temperature converted to the temperature of intermediate position can also be used instead.In this case, Without setting pressure sensor, system can be inexpensively constituted.
Hereinafter, the flowing on the thermal medium in thermal medium circulation loop B is illustrated.
Under full cooling operation pattern, using between thermal medium between heat exchanger 25a and thermal medium heat exchanger 25b both sides by thermal source The cold energy of side refrigerant is delivered to thermal medium, and cooled thermal medium is pressurizeed and flowed out by pump 31a and pump 31b, is situated between via the 2nd heat The thermal medium flow passage selector device 33d of mass flow circuit switching device 33a~the 2nd, flows into and utilizes side heat exchanger 35a~utilization side heat exchanger 35d.Moreover, thermal medium is absorbed heat in using side heat exchanger 35a~utilization side heat exchanger 35d from room air, room is thus carried out The refrigeration in interior space 7.
Then, thermal medium is from using side heat exchanger 35a~flowed out using side heat exchanger 35d and flowing into the adjustment of thermal medium flow Device 34a~thermal medium flow adjuster 34d.Now, adjusted by thermal medium flow adjuster 34a~thermal medium flow Device 34d effect, the flow of thermal medium is controlled into the flow born needed for indoor necessary air conditioner load and flows into utilization Side heat exchanger 35a~utilization side heat exchanger 35d.From thermal medium flow adjuster 34a~thermal medium flow adjuster 34d streams The thermal medium gone out is flowed between thermal medium by the thermal medium flow passage selector device 32d of the 1st thermal medium flow passage selector device 32a~the 1st Heat exchanger 25b between heat exchanger 25a and thermal medium, and by by indoor unit 3 from the interior space 7 absorb heat this part heat to system Cryogen side is conveyed, then is inhaled into pump 31a and pump 31b.
In addition, in the pipe arrangement 5 using side heat exchanger 35, thermal medium is passed through along from the 2nd thermal medium flow passage selector device 33 The direction flowing of the 1st thermal medium flow passage selector device 32 is reached by thermal medium flow adjuster 34.In addition, will be by TEMP The temperature of device 40a detections or the temperature and the temperature from the thermal medium flowed out using side heat exchanger 35 detected by temperature sensor 40b The difference of degree is controlled with being maintained at desired value, thus, it is possible to bear the necessary air conditioner load of the interior space 7.Exchanged heat between thermal medium The outlet temperature of device 25 can also temperature in use sensor 40a or any one party in temperature sensor 40b temperature, can also Use their mean temperature.
Now, the 1st thermal medium flow passage selector device 32 and the 2nd thermal medium flow passage selector device 33 are controlled so as to middle aperture Or between thermal medium the corresponding aperture of the heat medium temperature of heat exchanger 25b outlet between heat exchanger 25a and thermal medium, to ensure To the stream that heat exchanger 25b both sides circulate between heat exchanger 25a and thermal medium between thermal medium.In addition, using side heat exchanger 35 originally The temperature difference of Ying Yiqi entrance and exits is controlled, but using the entrance side of side heat exchanger 35 heat medium temperature be with by temperature The almost identical temperature of the temperature of sensor 40b detections is spent, by using temperature sensor 40b, temperature sensor can be reduced Quantity, can inexpensively constitute system.
[cooling and warming mixing operation mode]
The refrigeration of the flowing of refrigerant when Fig. 5 is the cooling and warming mixing operation mode for representing conditioner 100 Agent loop diagram.In the Fig. 5, on producing heat energy load using any one party in side heat exchanger 35, utilizing side heat exchanger 35 In remainder to produce cold portative situation be that the main body operation mode that heats in cooling and warming mixing operating is illustrated. In addition, in Figure 5, the pipe arrangement shown in thick line represents the pipe arrangement of heat source side refrigerant circulation.In addition, in Figure 5, using solid arrow The flow direction of heat source side refrigerant is represented, the flow direction of thermal medium is represented with dotted arrow.
Shown in Fig. 5 heat main body operation mode in the case of, in outdoor unit 1, by the 1st refrigerant flow path switch fill Putting 11 and switching to makes the heat source side refrigerant portion discharged from compressor 10 flow into relay unit 2 via the ground of heat source side heat exchanger 12. In relay unit 2, it is driven pump 31a and pump 31b, open thermal medium flow adjuster 34a~thermal medium flow is adjusted Engagement positions 34d, thermal medium respectively between thermal medium heat exchanger 25a and produce between cold portative utilization side heat exchanger 35, with And circulated between thermal medium between heat exchanger 25b and the hot portative utilization side heat exchanger 35 of generation.In addition, the 2nd refrigerant flow path Switching device 28a is switched to refrigeration side, and the 2nd cold-producing medium stream circuit switching device 28b, which is switched to, heats side, throttling arrangement 26a As standard-sized sheet, opening and closing device 27 is closed, and opening and closing device 29 is closed.
First, the flowing on the heat source side refrigerant in refrigerant circulation loop A is illustrated.
The refrigerant of low-temp low-pressure is compressed by compressor 10, gaseous refrigerant and discharge as HTHP.From The gaseous refrigerant for the HTHP that compressor 10 is discharged is used by the 1st cold-producing medium stream circuit switching device 11, and in refrigerant Turn on, by check-valves 13d, flowed out from outdoor unit 1 in connecting pipings 4a.The HTHP flowed out from outdoor unit 1 Gaseous refrigerant flows into relay unit 2 by refrigerant piping 4.Flow into the gaseous refrigerant of the HTHP of relay unit 2 Heat exchanger 25b between the thermal medium played a role is flowed into as condenser by the 2nd cold-producing medium stream circuit switching device 28b.
Heat exchanger 25b gaseous refrigerant dissipates to the thermal medium circulated in thermal medium circulation loop B between inflow thermal medium Condensation liquefaction while hot, as liquid refrigerant.Liquid refrigerant from heat exchanger 25b outflows between thermal medium is in throttling arrangement Low pressure two-phase system cryogen is expanded into 26b.The low pressure two-phase system cryogen is flowed into via throttling arrangement 26a and played as evaporator Heat exchanger 25a between the thermal medium of effect.Heat exchanger 25a low pressure two-phase system cryogen is recycled back to from thermal medium between inflow thermal medium The thermal medium circulated in the B of road is absorbed heat and evaporated, and thermal medium is cooled down.The low pressure two-phase system cryogen is from heat exchanger between thermal medium 25a flows out, and is flowed out via the 2nd cold-producing medium stream circuit switching device 28a from relay unit 2, outdoor is flowed into again by refrigerant piping 4 Unit 1.
The two-phase system cryogen of low-temp low-pressure of outdoor unit 1 is flowed into by check-valves 13b, inflow is played as evaporator The heat source side heat exchanger 12 of effect.Moreover, flow into heat source side heat exchanger 12 refrigerant in heat source side heat exchanger 12 from outer gas Heat absorption, the gaseous refrigerant as low-temp low-pressure.The gaseous refrigerant of the low-temp low-pressure flowed out from heat source side heat exchanger 12 Compressor 10 is inhaled into again via the 1st cold-producing medium stream circuit switching device 11 and memory 19.
In addition, in the way of the supercooling (degree of subcooling) of heat exchanger 25b outlet refrigerant between thermal medium turns into desired value Control throttling arrangement 26b aperture.In addition it is also possible to make throttling arrangement 26b standard-sized sheets, control to be subcooled using throttling arrangement 26a.
Hereinafter, the flowing on the thermal medium in thermal medium circulation loop B is illustrated.
In the case where heating main body operation mode, between thermal medium in heat exchanger 25b, the heat energy of heat source side refrigerant is delivered to heat Medium, heated thermal medium is flowed by pump 31b in pipe arrangement 5.In addition, in the case where heating main body operation mode, in thermal medium Between in heat exchanger 25a, the cold energy of heat source side refrigerant is delivered to thermal medium, and cooled thermal medium is by pump 31a in pipe arrangement 5 Flowing.Generation cold energy is flowed into via the 2nd thermal medium flow passage selector device 33 by pump 31a pressurizes and flows out cooled thermal medium The utilization side heat exchanger 35 of load, is flowed into by the thermal medium that pump 31b pressurizes and flows out via the 2nd thermal medium flow passage selector device 33 Produce hot portative utilization side heat exchanger 35.
Now, the 2nd thermal medium flow passage selector device 33 is the quilt when the indoor unit 3 connected is heating mode of operation The direction for being connected with heat exchanger 25b and pump 31b between thermal medium is switched to, is cooling operation pattern in the indoor unit 3 connected When, it is switched to the direction for being connected with heat exchanger 25a and pump 31a between thermal medium.That is, the 2nd thermal medium flow passage selector device is passed through 33, the thermal medium supplied to indoor unit 3 can be switched to and heat use or cooling.
Utilizing the refrigeration of the interior space 7 in side heat exchanger 35, carrying out from room air heat absorption being implemented by thermal medium Operating or the heating operation for the interior space 7 implemented to room air radiating by thermal medium.Now, according to thermal medium stream The effect of amount adjusting apparatus 34, the flow of thermal medium is controlled so as to bear the flow needed for indoor necessary air conditioner load and inflow Utilize side heat exchanger 35.
It is used for cooling operation and temperature slightly rises by using side heat exchanger 35 thermal medium passes through thermal medium stream The thermal medium flow passage selector device 32 of amount adjusting apparatus 34 and the 1st, flows into heat exchanger 25a between thermal medium, then be inhaled into pump 31a.Quilt For heating operation and temperature is slightly reduced by using side heat exchanger 35 thermal medium passes through thermal medium flow adjuster 34 and the 1st thermal medium flow passage selector device 32, flows into heat exchanger 25b between thermal medium, then be inhaled into pump 31a.Now, the 1st heat is situated between Mass flow circuit switching device 32 is, when the indoor unit 3 connected is heating mode of operation, to be switched to and be connected between thermal medium Heat exchanger 25b and pump 31b direction, when the indoor unit 3 connected is cooling operation pattern, is switched to and is connected with hot Jie Heat exchanger 25a and pump 31a direction between matter.
Period, the thermal medium of heating and the thermal medium of cooling are according to the 1st thermal medium flow passage selector device 32 and the 2nd thermal medium The effect of flow passage selector device 33, is not imported into mixedly and there is heat energy load, cold portative utilization side heat exchanger 35 respectively. Thus, make to be used for the thermal medium of heating mode of operation as heat purposes flow into by refrigerant the thermal medium of heat is provided between change Hot device 25b, makes to be used for the thermal medium of cooling operation pattern and flows into refrigerant as refrigeration purposes to receive between the thermal medium of heat Heat exchanger 25a, has carried out with refrigerant after heat exchange, has been conveyed to pump 31a and pump 31b respectively again.
In addition, in the pipe arrangement 5 using side heat exchanger 35, heating side and refrigeration side, thermal medium is situated between all along from the 2nd heat Mass flow circuit switching device 33 flows via the direction of the thermal medium flow passage selector device 32 of thermal medium flow adjuster 34 to the 1st. In addition, side is being heated, by the temperature detected by temperature sensor 40b and the temperature from the thermal medium flowed out using side heat exchanger 35 Difference, in refrigeration side, by from the temperature of the thermal medium flowed out using side heat exchanger 35 and the temperature that is detected by temperature sensor 40a Difference desired value is ensured to be controlled, thus, it is possible to bear the necessary air conditioner load of the interior space 7.
In addition, during cooling and warming mixing operation mode in Fig. 5 conditioner 100, utilizing side heat exchanger It is to mix that any one party in 35, which produces cold energy load and produces hot portative situation using the remainder in side heat exchanger 35, Close under the refrigeration main body operation mode in operating, the flowing of the heat source side refrigerant in refrigerant circulation loop A and thermal medium are followed The flowing of thermal medium in loop back path B becomes identical with heating main body operation mode.
[pump rotation operating control 1 (heating the operating of main body side pump, full cooling operation pattern)]
Fig. 6 is the stream of refrigerant when pump 31a when representing the full cooling operation pattern of conditioner 100 does not work The refrigerant loop figure of the flowing of dynamic and thermal medium.In the Fig. 6, pump rotation operating control during on full cooling operation pattern 1 illustrates.In addition, in figure 6, the pipe arrangement shown in thick line represents the pipe arrangement of heat supply source refrigerant circulation.In addition, in Fig. 6 In, solid arrow represents the flow direction of heat source side refrigeration, and dotted arrow represents the flow direction of thermal medium.
In the case of pump rotation operating control 1 shown in Fig. 6, in outdoor unit 1, the 1st cold-producing medium stream circuit switching device 11 switch to the heat source side refrigerant inflow heat source side heat exchanger 12 for making to discharge from compressor 10.That is, in conditioner 100 In, in full cooling operation pattern, heat main body side i.e. pump 31a it is idle in the case of, implement outdoor unit 1 work with The common full cooling operation pattern work identical operating first illustrated.
In relay unit 2, stop the pump 31a for heating main body side, make the refrigeration main body side i.e. pump with pump 31a independences 31b drives, and open thermal medium flow adjuster 34a~thermal medium flow adjuster 34d, thermal medium exchanges heat between thermal medium Circulated between device 25b and utilization side heat exchanger 35a~utilization side heat exchanger 35d.Now, between thermal medium in heat exchanger 25a, by Stop in pump 31a, so thermal medium can not be circulated between using side heat exchanger 35a~utilization side heat exchanger 35d.Thus, Between thermal medium in heat exchanger 25a, it is not necessary to carry out the heat exchange between refrigerant and thermal medium, the switching of the 2nd refrigerant flow path Device 28b is switched to refrigeration side.On the other hand, the 2nd cold-producing medium stream circuit switching device 28a, which is switched to, heats side.In addition, opening Close device 27 to open, opening and closing device 29 is closed.
First, the flowing on the heat source side refrigerant in refrigerant circulation loop A is illustrated.
The refrigerant of low-temp low-pressure is compressed by compressor 10, gaseous refrigerant and discharge as HTHP.From The gaseous refrigerant for the HTHP that compressor 10 is discharged passes through heat source side by the 1st cold-producing medium stream circuit switching device 11 Heat exchanger 12, is carried out with the heat exchange of outer gas, liquid or two-phase system cryogen as HTHP, passed through check-valves 13a it Afterwards, turned on, flowed out from outdoor unit 1 with connecting pipings 4a in refrigerant.The liquid of the HTHP flowed out from outdoor unit 1 State or two-phase system cryogen flow into relay unit 2 by refrigerant piping 4.
The liquid or two-phase system cryogen of the HTHP of inflow relay unit 2 have passed through after opening and closing device 27, in section Flow in device 26b and expand, the two-phase system cryogen as low-temp low-pressure.In addition, now, throttling arrangement 26a is closed, and refrigerant is not Pass through.Evaporation gasification while the thermal medium heat absorption that the two-phase system cryogen is circulated from thermal medium circulation loop B, as low temperature Gaseous refrigerant.Pass through the 2nd cold-producing medium stream circuit switching device 28b from the gaseous refrigerants flowed out of heat exchanger 25b between thermal medium Flowed out from relay unit 2, dress is switched via the 1st refrigerant flow path by refrigerant connecting pipings 4b, and by check-valves 13c Put 11 and memory 19 be inhaled into compressor 10 again.
Now, with the pressure for the heat source side refrigerant flowed between thermal medium between heat exchanger 25b and throttling arrangement 26b The temperature difference that power has carried out the saturation temperature obtained value of conversion and heat exchanger 25b outlet side between thermal medium is overheated and (overheated Degree) turn into the aperture that constant mode controls throttling arrangement 26b.Furthermore it is possible to determine the interposition of heat exchanger 25b between thermal medium , can also be instead of using the saturation temperature converted for the temperature at intermediate position in the case of the temperature put.Should In the case of, without setting pressure sensor, it can inexpensively constitute system.
Hereinafter, the flowing on the thermal medium in thermal medium circulation loop B is illustrated.
Under full cooling operation pattern when pump 31a stops, only between thermal medium in heat exchanger 25b, the heat energy of thermal medium Heat source side refrigerant is delivered to, cooled thermal medium is pressurizeed and flowed out by pump 31b, via the 2nd thermal medium flow passage selector device The thermal medium flow passage selector device 33d of 33a~the 2nd, flows into and utilizes side heat exchanger 35a~utilization side heat exchanger 35d.Moreover, heat is situated between Matter, from room air heat absorption, thus carries out the refrigeration of the interior space 7 in using side heat exchanger 35a~utilization side heat exchanger 35d.
Thus, thermal medium is from using side heat exchanger 35a~flowed out using side heat exchanger 35d and flowing into the adjustment of thermal medium flow Device 34a~thermal medium flow adjuster 34d.Now, adjusted according to thermal medium flow adjuster 34a~thermal medium flow Device 34d effect, the flow for being controlled so as to bear needed for flow his the indoor necessary air conditioner load of thermal medium simultaneously flows into profit With side heat exchanger 35a~utilization side heat exchanger 35d.From thermal medium flow adjuster 34a~thermal medium flow adjuster 34d The thermal medium of outflow flows into thermal medium by the thermal medium flow passage selector device 32d of the 1st thermal medium flow passage selector device 32a~the 1st Between heat exchanger 25b, the heat for the amount absorbed heat by indoor unit 3 from the interior space 7 is shifted to refrigerant side, then be inhaled into pump 31b。
In addition, in the pipe arrangement 5 using side heat exchanger 35, thermal medium is passed through along from the 2nd thermal medium flow passage selector device 33 Flowed by the direction of the thermal medium flow passage selector device 32 of thermal medium flow adjuster 34 to the 1st.In addition, with will be by TEMP The temperature of device 40b detections and the temperature difference from the thermal medium flowed out using side heat exchanger 35 ensure the mode of desired value to carry out Control, thus, it is possible to bear the necessary air conditioner load of the interior space 7.
Now, for the 1st thermal medium flow passage selector device 32 and the 2nd thermal medium flow passage selector device 33, pump 31a not works Make, thus, heat exchanger 25a between thermal medium is not flowed into, with ensure flow into thermal medium between heat exchanger 25b thermal medium stream side Formula, aperture is adjusted to this side of heat exchanger 25b between thermal medium, or, it is controlled so as to the heat exchanger 25b outlet between thermal medium The corresponding aperture of heat medium temperature.In addition, should be controlled using the script of side heat exchanger 35 according to the temperature difference of its entrance and exit System, but be almost identical with the temperature detected by temperature sensor 40b using the heat medium temperature of the entrance side of side heat exchanger 35 Temperature, by using temperature sensor 40b, the quantity of temperature sensor can be reduced, system can be inexpensively constituted.
[pump rotation operating control 2 (the pump operating of refrigeration main body side, full cooling operation pattern)]
Fig. 7 is the stream of refrigerant when pump 31b when representing the full cooling operation pattern of conditioner 100 does not work The refrigerant loop figure of the flowing of dynamic and thermal medium.In the Fig. 7, pump rotation operating control during on full cooling operation pattern 2 illustrate.In addition, in the figure 7, the pipe arrangement shown in thick line represents the pipe arrangement of heat supply source refrigerant circulation.In addition, in Fig. 7 In, solid arrow represents the flow direction of heat source side refrigeration, and dotted arrow represents the flow direction of thermal medium.
In the case of pump rotation operating control 2 shown in Fig. 7, in outdoor unit 1, the 1st refrigerant flow path is switched and filled Putting 11 and switching to makes the heat source side refrigerant discharged from compressor 10 flow into heat source side heat exchanger 12.That is, in conditioner In 100, in full cooling operation pattern, in the case of refrigeration main body side is pump 31b idle, implement the work of outdoor unit 1 With the common full cooling operation work identical operating formerly illustrated.
In relay unit 2, stop the pump 31b of refrigeration main body side, make the heating operation side i.e. pump with pump 31b independences 31a drives, and open thermal medium flow adjuster 34a~thermal medium flow adjuster 34d, thermal medium exchanges heat between thermal medium Circulated between device 25a and utilization side heat exchanger 35a~utilization side heat exchanger 35d.Now, between thermal medium in heat exchanger 25b, by Stop in pump 31b, so thermal medium can not be circulated between using side heat exchanger 35a~utilization side heat exchanger 35d.Thus, Between thermal medium in heat exchanger 25b, it is not necessary to carry out the heat exchange between refrigerant and thermal medium, the switching of the 2nd refrigerant flow path Device 28b, which is switched to, heats side.On the other hand, the 2nd cold-producing medium stream circuit switching device 28a is switched to refrigeration side.In addition, opening Close device 27 to open, opening and closing device 29 is closed.
First, the flowing on the heat source side refrigerant in refrigerant circulation loop A is illustrated.
The refrigerant of low-temp low-pressure is compressed by compressor 10, gaseous refrigerant and discharge as HTHP.From The gaseous refrigerant for the HTHP that compressor 10 is discharged passes through heat source side by the 1st cold-producing medium stream circuit switching device 11 Heat exchanger 12, is carried out with the heat exchange of outer gas, liquid or two-phase system cryogen as HTHP, passed through check-valves 13a it Afterwards, turned on, flowed out from outdoor unit 1 with connecting pipings 4a in refrigerant.The liquid of the HTHP flowed out from outdoor unit 1 State or two-phase system cryogen flow into relay unit 2 by refrigerant piping 4.
The liquid or two-phase system cryogen of the HTHP of inflow relay unit 2 have passed through after opening and closing device 27, in section Flow in device 26a and expand, the two-phase system cryogen as low-temp low-pressure.In addition, now, throttling arrangement 26b is closed, and refrigerant is not Pass through.Evaporation gasification while the thermal medium heat absorption that the two-phase system cryogen is circulated from thermal medium circulation loop B, as low temperature Gaseous refrigerant.Pass through the 2nd cold-producing medium stream circuit switching device 28a from the gaseous refrigerants flowed out of heat exchanger 25a between thermal medium Flowed out from relay unit 2, and by refrigerant connecting pipings 4b, switched by check-valves 13c via the 1st refrigerant flow path and filled Put 11 and memory 19 be inhaled into compressor 10 again.
Now, by the pressure of the heat source side refrigerant flowed between thermal medium between heat exchanger 25a and throttling arrangement 26a Overheat (the mistake that the temperature difference of heat exchanger 25a outlet side between the saturation temperature obtained value of conversion and thermal medium is obtained is carried out Temperature) turn into constant mode, control throttling arrangement 26a aperture.In addition, between it can determine thermal medium heat exchanger 25a In the case of the temperature in centre position, the saturation temperature converted to the temperature of intermediate position can also be used instead Degree.In this case, without setting pressure sensor, can inexpensively constitute system.
Hereinafter, the flowing on the thermal medium in thermal medium circulation loop B is illustrated.
Under full cooling operation pattern when pump 31b stops, only between thermal medium in heat exchanger 25a, the heat energy of thermal medium The refrigerant transmission of heat source side, cooled thermal medium is pressurizeed and flowed out by pump 31a, via the 2nd thermal medium flow passage selector device The thermal medium flow passage selector device 33d of 33a~the 2nd, flows into and utilizes side heat exchanger 35a~utilization side heat exchanger 35d.Moreover, heat is situated between Matter, from room air heat absorption, thus carries out the refrigeration of the interior space 7 in using side heat exchanger 35a~utilization side heat exchanger 35d.
Thus, thermal medium is from using side heat exchanger 35a~flowed out using side heat exchanger 35d and flowing into the adjustment of thermal medium flow Device 34a~thermal medium flow adjuster 34d.Now, adjusted according to thermal medium flow adjuster 34a~thermal medium flow Device 34d effect, the flow for being controlled so as to bear needed for flow his the indoor necessary air conditioner load of thermal medium simultaneously flows into profit With side heat exchanger 35a~utilization side heat exchanger 35d.From thermal medium flow adjuster 34a~thermal medium flow adjuster 34d The thermal medium of outflow flows into thermal medium by the thermal medium flow passage selector device 32d of the 1st thermal medium flow passage selector device 32a~the 1st Between heat exchanger 25a, and the heat for the amount absorbed heat by indoor unit 3 from the interior space 7 is shifted to refrigerant side, then be inhaled into Pump 31a.
In addition, in the pipe arrangement 5 using side heat exchanger 35, thermal medium is passed through along from the 2nd thermal medium flow passage selector device 33 Flowed by the direction of the thermal medium flow passage selector device 32 of thermal medium flow adjuster 34 to the 1st.In addition, with will be by TEMP The mode that the temperature of device 40a detections and the temperature difference from the thermal medium flowed out using side heat exchanger 35 ensure into desired value is carried out Control, thus, it is possible to bear the necessary air conditioner load of the interior space 7.
Now, for the 1st thermal medium flow passage selector device 32 and the 2nd thermal medium flow passage selector device 33, pump 31b not works Make, heat exchanger 25b between thermal medium is not thus flowed into, with ensure flow into thermal medium between heat exchanger 25a thermal medium stream side Formula, aperture is adjusted to this side of heat exchanger 25a between thermal medium, or, control into the heat of the heat exchanger 25a outlet between thermal medium The corresponding aperture of medium temperature.In addition, should be controlled using the script of side heat exchanger 35 according to the temperature difference of its entrance and exit, But make the temperature roughly the same with the temperature detected by temperature sensor 40a using the heat medium temperature of the entrance side of side heat exchanger 35 Degree, by using temperature sensor 40a, can reduce the quantity of temperature sensor, can inexpensively constitute system.
[pump rotation operating control 3 (heating the operating of main body side pump, full heating mode of operation)]
Fig. 8 is the stream of refrigerant when pump 31a when representing the full heating mode of operation of conditioner 100 does not work The refrigerant loop figure of the flowing of dynamic and thermal medium.In the Fig. 8, pump rotation operating control during on full heating mode of operation 3 illustrate.In addition, in fig. 8, the pipe arrangement shown in thick line represents the pipe arrangement of heat supply source refrigerant circulation.In addition, in Fig. 8 In, solid arrow represents the flow direction of heat source side refrigeration, and dotted arrow represents the flow direction of thermal medium.
In the case of pump rotation operating control 3 shown in Fig. 8, in outdoor unit 1, the 1st refrigerant flow path is switched and filled Putting 11 and switching to makes the heat source side refrigerant discharged from compressor 10 flow into relay unit 2 not via the ground of heat source side heat exchanger 12. That is, in conditioner 100, in full heating mode of operation, heat main body side i.e. pump 31a it is idle in the case of, it is real Apply the work of outdoor unit 1 and the common full heating mode of operation work identical operating formerly illustrated.
In relay unit 2, stop the pump 31a for heating main body side, make the refrigeration main body side i.e. pump with pump 31a independences 31b drives, and open thermal medium flow adjuster 34a~thermal medium flow adjuster 34d, thermal medium exchanges heat between thermal medium Circulated between device 25b and utilization side heat exchanger 35a~utilization side heat exchanger 35d.Now, between thermal medium in heat exchanger 25a, by Stop in pump 31a, so thermal medium can not be circulated between using side heat exchanger 35a~utilization side heat exchanger 35d.Thus, Between thermal medium in heat exchanger 25a, it is not necessary to carry out the heat exchange between refrigerant and thermal medium, the switching of the 2nd refrigerant flow path Device 28b, which is switched to, heats side, on the other hand, and the 2nd cold-producing medium stream circuit switching device 28a is switched to refrigeration side.In addition, opening Close device 27 to close, opening and closing device 29 is opened.
First, the flowing on the heat source side refrigerant in refrigerant circulation loop A is illustrated.
The refrigerant of low-temp low-pressure is compressed by compressor 10, gaseous refrigerant and discharge as HTHP.From The gaseous refrigerant for the HTHP that compressor 10 is discharged is connected by the 1st cold-producing medium stream circuit switching device 11 in refrigerant Connect in pipe arrangement 4a and turn on, by check-valves 13d, flowed out from outdoor unit 1.The gas of the HTHP flowed out from outdoor unit 1 State refrigerant flows into relay unit 2 by refrigerant piping 4.The gaseous refrigerant for flowing into the HTHP of relay unit 2 leads to Cross the 2nd cold-producing medium stream circuit switching device 28b and flow into heat exchanger 25b between thermal medium.In addition, now, because pump 31a does not work, institute To flow into heat exchanger 25a between thermal medium, the thermal medium not circulated.Thus, the gaseous refrigerant for flowing into relay unit 2 is situated between to heat Flowed between matter in heat exchanger 25a, do not carry out heat exchange.
The gaseous refrigerant of heat exchanger 25b HTHP is followed in thermal medium circulation loop B between inflow thermal medium Condensation liquefaction, the liquid refrigerant as high pressure while the thermal medium radiating of ring.The liquid flowed out from heat exchanger 25b between thermal medium State refrigerant expands in throttling arrangement 26b, the two-phase system cryogen as low-temp low-pressure.The two-phase system cryogen is filled by being opened and closed 29 are put, is flowed out from relay unit 2, outdoor unit 1 is flowed into by refrigerant piping 4 again.The refrigerant of outdoor unit 1 is flowed into system Cryogen is turned on in connecting pipings 4b, by check-valves 13b, flows into the heat source side heat exchanger 12 played a role as evaporator. Now, throttling arrangement 26a for do not make refrigerant flow into thermal medium between heat exchanger 25a close.
Moreover, flow into heat source side heat exchanger 12 heat source side refrigerant in heat source side heat exchanger 12 from the exterior space 6 Outer gas is absorbed heat, the gaseous refrigerant as low-temp low-pressure.The gaseous state system of the low-temp low-pressure flowed out from heat source side heat exchanger 12 Cryogen is inhaled into compressor 10 again via the 1st cold-producing medium stream circuit switching device 11 and memory 19.
Now, by the pressure of the heat source side refrigerant flowed between thermal medium between heat exchanger 25b and throttling arrangement 26b It is converted into the supercooling (supercooling that the temperature difference of the outlet side of heat exchanger 25 between the value and thermal medium that saturation temperature obtains is obtained Degree) turn into constant mode, control throttling arrangement 26b aperture.Furthermore it is possible to determine the centre of heat exchanger 25b between thermal medium In the case of the temperature of position, the saturation temperature converted to the temperature of intermediate position can also be used instead.Should In the case of, without setting pressure sensor, it can inexpensively constitute system.
Hereinafter, the flowing on the thermal medium in thermal medium circulation loop B is illustrated.
Under full heating mode of operation when pump 31a stops, only between thermal medium in heat exchanger 25b, heat source side refrigerant Heat energy be delivered to thermal medium, heated thermal medium is flowed by pump 31b in pipe arrangement 5.The heat pressurizeed and flowed out by pump 31b Medium flows into via the thermal medium flow passage selector device 33d of the 2nd thermal medium flow passage selector device 33a~the 2nd and utilizes side heat exchanger 35a~utilization side heat exchanger 35d.Moreover, thermal medium using in side heat exchanger 35a~utilization side heat exchanger 35d to Interior Space Gas radiates, and thus carries out heating for the interior space 7.
Thus, thermal medium is from using side heat exchanger 35a~flowed out using side heat exchanger 35d and flowing into the adjustment of thermal medium flow Device 34a~thermal medium flow adjuster 34d.Now, adjusted according to thermal medium flow adjuster 34a~thermal medium flow Device 34d effect, the flow of thermal medium is controlled so as to bear the flow needed for indoor necessary air conditioner load and flows into utilization Side heat exchanger 35a~utilization side heat exchanger 35d.From thermal medium flow adjuster 34a~thermal medium flow adjuster 34d streams The thermal medium gone out is flowed between thermal medium by the thermal medium flow passage selector device 32d of the 1st thermal medium flow passage selector device 32a~the 1st Heat exchanger 25b, the heat for the amount for receiving to supply to the interior space 7 by indoor unit 3 from refrigerant side, then it is inhaled into pump 31b.
In addition, in the pipe arrangement 5 using side heat exchanger 35, thermal medium is passed through along from the 2nd thermal medium flow passage selector device 33 Flowed by the direction of the thermal medium flow passage selector device 32 of thermal medium flow adjuster 34 to the 1st.In addition, with will be by TEMP The temperature of device 40b detections and the temperature difference from the thermal medium flowed out using side heat exchanger 35 ensure the mode of desired value to carry out Control, thus, it is possible to bear the necessary air conditioner load of the interior space 7.
Now, the 1st thermal medium flow passage selector device 32 and the 2nd thermal medium flow passage selector device 33 are controlled so as to be able to ensure that Flow to the aperture of heat exchanger 25b stream between thermal medium or between thermal medium heat exchanger 25b outlet heat medium temperature phase The aperture answered.In addition, should be controlled using the script of side heat exchanger 35 according to the temperature difference of its entrance and exit, but changed using side The heat medium temperature of the entrance side of hot device 35 makes the temperature almost identical with the temperature detected by temperature sensor 40b, by making Temperature sensor 40b is used, the quantity of temperature sensor can be reduced, system can be inexpensively constituted.
[pump rotation operating control 4 (the pump operating of refrigeration main body side, full heating mode of operation)]
Fig. 9 is the refrigerant when pump 31b for representing in the full heating mode of operation of conditioner 100 does not work Flowing and the refrigerant loop figure of the flowing of thermal medium.In the Fig. 9, pump rotation operating control during on full heating mode of operation System 4 is illustrated.In addition, in fig .9, the pipe arrangement shown in thick line represents the pipe arrangement of heat supply source refrigerant circulation.In addition, in figure In 9, solid arrow represents the flow direction of heat source side refrigeration, and dotted arrow represents the flow direction of thermal medium.
In the case of pump rotation operating control 4 shown in Fig. 9, in outdoor unit 1, the 1st refrigerant flow path is switched and filled Putting 11 and switching to makes the heat source side refrigerant discharged from compressor 10 flow into relay unit 2 not via the ground of heat source side heat exchanger 12. That is, it is real in the case of refrigeration main body side is pump 31b idle in full heating mode of operation in conditioner 100 Apply the work of outdoor unit 1 and the common full heating mode of operation work identical operating formerly illustrated.
In relay unit 2, stop the pump 31b of refrigeration main body side, make to heat main body side i.e. pump with pump 31b independences 31a drives, and open thermal medium flow adjuster 34a~thermal medium flow adjuster 34d, thermal medium exchanges heat between thermal medium Circulated between device 25a and utilization side heat exchanger 35a~utilization side heat exchanger 35d.Now, between thermal medium in heat exchanger 25b, by Stop in pump 31b, so thermal medium can not be circulated between using side heat exchanger 35a~utilization side heat exchanger 35d.Thus, Between thermal medium in heat exchanger 25b, it is not necessary to carry out the heat exchange between refrigerant and thermal medium, the switching of the 2nd refrigerant flow path Device 28a, which is switched to, heats side.On the other hand, the 2nd cold-producing medium stream circuit switching device 28b is switched to refrigeration side.In addition, opening Close device 27 to close, opening and closing device 29 is opened.
First, the flowing on the heat source side refrigerant in refrigerant circulation loop A is illustrated.
The refrigerant of low-temp low-pressure is compressed by compressor 10, gaseous refrigerant and discharge as HTHP.From The gaseous refrigerant for the HTHP that compressor 10 is discharged is connected by the 1st cold-producing medium stream circuit switching device 11 in refrigerant Connect in pipe arrangement 4a and turn on, by check-valves 13d, flowed out from outdoor unit 1.The gas of the HTHP flowed out from outdoor unit 1 State refrigerant flows into relay unit 2 by refrigerant piping 4.The gaseous refrigerant for flowing into the HTHP of relay unit 2 leads to The 2nd cold-producing medium stream circuit switching device 28a is crossed, heat exchanger 25a between thermal medium is flowed into.In addition, now, because pump 31b does not work, institute To flow into heat exchanger 25b between thermal medium, the thermal medium not circulated.Thus, the gaseous refrigerant for flowing into relay unit 2 flows into heat Between medium in heat exchanger 25b, heat exchange is not carried out.
The gaseous refrigerant of heat exchanger 25a HTHP is followed in thermal medium circulation loop B between inflow thermal medium Condensation liquefaction, the liquid refrigerant as high pressure while the thermal medium radiating of ring.The liquid flowed out from heat exchanger 25a between thermal medium State refrigerant expands in throttling arrangement 26a, the two-phase system cryogen as low-temp low-pressure.The two-phase system cryogen is filled by being opened and closed 29 are put, is flowed out from relay unit 2, outdoor unit 1 is flowed into by refrigerant piping 4 again.The refrigerant of outdoor unit 1 is flowed into system Cryogen is turned on in connecting pipings 4b, by check-valves 13b, flows into the heat source side heat exchanger 12 played a role as evaporator. Now, throttling arrangement 26b for do not make refrigerant flow into thermal medium between heat exchanger 25b close.
Moreover, flow into heat source side heat exchanger 12 heat source side refrigerant in heat source side heat exchanger 12 from the exterior space 6 Outer gas is absorbed heat, the gaseous refrigerant as low-temp low-pressure.The gaseous state system of the low-temp low-pressure flowed out from heat source side heat exchanger 12 Cryogen is inhaled into compressor 10 again via the 1st cold-producing medium stream circuit switching device 11 and memory 19.
Now, by the pressure of the heat source side refrigerant flowed between thermal medium between heat exchanger 25a and throttling arrangement 26a It is converted into the supercooling (supercooling that the temperature difference of the outlet side of heat exchanger 25 between the value and thermal medium that saturation temperature obtains is obtained Degree) turn into constant mode, control throttling arrangement 26a aperture.Furthermore it is possible to determine the centre of heat exchanger 25a between thermal medium In the case of the temperature of position, the saturation temperature converted to the temperature of intermediate position can also be used instead.Should In the case of, without setting pressure sensor, it can inexpensively constitute system.
Hereinafter, the flowing on the thermal medium in thermal medium circulation loop B is illustrated.
Under full heating mode of operation when pump 31b stops, only between thermal medium in heat exchanger 25a, heat source side refrigerant Heat energy be delivered to thermal medium, heated thermal medium is flowed by pump 31a in pipe arrangement 5.The heat pressurizeed and flowed out by pump 31a Medium flows into via the thermal medium flow passage selector device 33d of the 2nd thermal medium flow passage selector device 33a~the 2nd and utilizes side heat exchanger 35a~utilization side heat exchanger 35d.Moreover, thermal medium using in side heat exchanger 35a~utilization side heat exchanger 35d to Interior Space Gas radiates, and thus carries out heating for the interior space 7.
Thus, thermal medium is from using side heat exchanger 35a~flowed out using side heat exchanger 35d and flowing into the adjustment of thermal medium flow Device 34a~thermal medium flow adjuster 34d.Now, adjusted according to thermal medium flow adjuster 34a~thermal medium flow Device 34d effect, the flow of thermal medium is controlled so as to bear the flow needed for indoor necessary air conditioner load and flows into utilization Side heat exchanger 35a~utilization side heat exchanger 35d.From thermal medium flow adjuster 34a~thermal medium flow adjuster 34d streams The thermal medium gone out is flowed between thermal medium by the thermal medium flow passage selector device 32d of the 1st thermal medium flow passage selector device 32a~the 1st Heat exchanger 25a, the heat for the amount for receiving to supply to the interior space 7 by indoor unit 3 from refrigerant side, then it is inhaled into pump 31a.
In addition, in the pipe arrangement 5 using side heat exchanger 35, thermal medium is passed through along from the 2nd thermal medium flow passage selector device 33 Flowed by the direction of the thermal medium flow passage selector device 32 of thermal medium flow adjuster 34 to the 1st.In addition, with will be by TEMP The temperature of device 40a detections and the temperature difference from the thermal medium flowed out using side heat exchanger 35 ensure the mode of desired value to carry out Control, thus, it is possible to bear the necessary air conditioner load of the interior space 7.
Now, the 1st thermal medium flow passage selector device 32 and the 2nd thermal medium flow passage selector device 33 are controlled so as to be able to ensure that Flow to the aperture of heat exchanger 25a stream between thermal medium or between thermal medium heat exchanger 25a outlet heat medium temperature phase The aperture answered.In addition, should be controlled using the script of side heat exchanger 35 according to the temperature difference of its entrance and exit, but changed using side The heat medium temperature of the entrance side of hot device 35 is the temperature roughly the same with the temperature detected by temperature sensor 40a, by making Temperature sensor 40a is used, the quantity of temperature sensor can be reduced, system can be inexpensively constituted.
More than, in conditioner 100, refrigeration load in the indoor unit 3 connected or to heat load small In the case of, in full cooling operation pattern, full heating mode of operation, make the part stopping in multiple pumps 31, can persistently enter Row cooling operation or heating operation.In addition, in the following description, sometimes by the indoor unit 3 connected referred to as junction chamber Unit 3.
In thermal medium circulation loop B, to realize cooling operation, heating operation, for connecting relay unit 2 and connection In the pipe arrangement 5 or relay unit 2 itself of indoor unit 3, connection indoor unit 3 itself, the material of used pipe arrangement is sometimes For copper.Thus, it is conveying thermal medium, when exporting excessive flow by pump 31, in the flow velocity increase of the thermal medium of Bottomhole pressure (being in general more than 2 [m/S]), may cause pitting in pipe arrangement.Especially, in conditioner 100, in junction chamber In the case that the running capacity of unit 3 is very small, when making pump 31a, pump 31b both sides operating, for two pumps, no matter minimum output Value, all may convey thermal medium with excessive flow.
To avoid the pitting caused by the flow velocity of thermal medium, in conditioner 100, implement what Fig. 6~Fig. 9 illustrated The operation mode of any one in pump rotation operating control 1~4.
Moreover, by carrying out having used the operation mode of 1 in many pumps 31, with carrying out the operating using many pumps 31 Control is compared, and driving power is less.
Here, the operational mode of any one in the pump rotation operating control 1~4 on implementing conditioner 100 The flow of the hand-off process of the operating number of pump 31 during formula is illustrated.Figure 10 is the pump rotation for representing conditioner 100 The flow chart of the flow of the hand-off process of the operating number of pump 31 during transhipment turn control 1,2.Figure 11 fills expression air adjustment Put 100 pump rotation operating control 3,4 when pump 31 operating number hand-off process flow flow chart.Figure 12 is to represent In the case that the load of connection indoor unit 3 under each operation mode in conditioner 100 is small, when 1 pump 31 stops Refrigerant circulation loop A and thermal medium circulation loop B work table.Figure 13 is the small feelings of load for connecting indoor unit 3 Under condition, drive during for making the change of driving power during flow-reduction using 2 pumps 31 and make flow-reduction using 1 pump 31 The figure line that the change of dynamic power is compared.
Based on Figure 10~Figure 12, under full cooling operation pattern, full heating mode of operation with the number of units of pump 31 The work of the related refrigerant circulation loop A of the heat source side refrigerant of heat exchanger 25 driving part is determined between change inflow thermal medium When and the thermal medium circulation loop B work of driving part be specifically described.In addition, (1)~(8) and Figure 10 shown in Figure 12 And (1) shown in Figure 11~(8) correspondence.In addition, in fig. 13, transverse axis represents to connect the necessary load in indoor unit 3, the longitudinal axis Represent now to disclosure satisfy that total input value of the pump 31 under the thermal medium flow of load.
[the operating switching of the pump 31 during full cooling operation pattern]
Based on Figure 10, Figure 12 and Figure 13, the hand-off process of the operating number of the pump 31 during on full cooling operation pattern is entered Row explanation.In addition, the capacity of the connection indoor unit 3 illustrated below is connected the utilization side heat exchange housed in indoor unit 3 with this The capacity of device 35 is synonymous.
In full cooling operation pattern, control device 50 judges the connection of the implementation cooling operation in connection indoor unit 3 The total capacity of indoor unit 3 (implements ratio of the load relative to full connection indoor unit 3 of the connection indoor unit 3 of cooling operation Example) whether it is below the lower limit capacity for the thermal capacity that can be conveyed in thermal medium circulation loop B (S1).It is determined as in junction chamber (the S1 when total capacity of unit 3 is below the lower limit capacity for the thermal capacity that can be conveyed in thermal medium circulation loop B；It is), control Device 50 processed makes the number of units of the pump 31 of operating reduce (S2；It is~S5).On the other hand, it is judged to connecting total appearance of indoor unit 3 (the S1 when lower limit capacity of thermal capacity of the amount than that can be conveyed in thermal medium circulation loop B is big；It is no), control device 50 makes operating Pump 31 number of units increase (S6；No~S9).
In S2, control device 50 judges the whether many operatings of pump 31.It is determined as (S2 in the case of many operatings of pumps 31； It is), control device 50 judges the operating relative importance value (S3) of pump 31 to implement pump rotation operating control 1,2.The operating of pump 31 is preferential Degree is for example determined according to the length of total driving time of pump 31.Thereby, it is possible to the pump for the side for making total driving time length 31 stop, and can realize the homogenization of total driving time of all pumps 31.
In S3, be determined as pump 31b relative importance value it is higher than pump 31a in the case of (S3；Pump 31b), control device 50 is performed The sequence number that works (1) (S4).In work sequence number (1), since the state that pump 31a, pump 31b both sides operate, stop pump 31a Only.But, make before pump 31a stoppings, the 2nd cold-producing medium stream circuit switching device 28a is switched to and heats side (work (1)), is closed Throttling arrangement 26a (work (2)).Then, pump 31a is made to stop (work (3)).
In S3, be determined as pump 31a relative importance value it is higher than pump 31b in the case of (S3；Pump 31a), control device 50 is performed The sequence number that works (2) (S5).In work sequence number (2), since the state that pump 31a, pump 31b both sides operate, stop pump 31b Only.But, make before pump 31b stoppings, the 2nd cold-producing medium stream circuit switching device 28b is switched to and heats side (work (1)), is closed Throttling arrangement 26b (work (2)).Then, pump 31b is made to stop (work (3)).
In S2, it is determined as it not being (S2 in the case that many pumps 31 are operated；It is no), control device 50 terminates pump rotation operating Control 1,2.
In S6, control device 50 determines whether that many pumps 31 are operated.It is determined as not being situation that many pumps 31 are operated Under (S6；It is no), control device 50 carries out specifying (S7) to the operating number of pump 31.
In S7, (S7 in the case of pump 31b operatings is appointed as；Pump 31b), control device 50 performs work sequence number (3) (S8).In work sequence number (3), since the state that pump 31a stops, make pump 31a, pump 31b both sides operating.But, make pump 31a, pump 31b both sides driven at low speed (work (1)), release throttling arrangement 26a closing (work (2)), then, by the 2nd refrigeration Agent flow passage selector device 28a is switched to refrigeration side (work (3)).
In S7, (S7 in the case of pump 31a operatings is appointed as；Pump 31a), control device 50 performs work sequence number (4) (S9).In work sequence number (4), since the state that pump 31b stops, make pump 31a, pump 31b both sides operating.But, make pump 31a, pump 31b both sides driven at low speed (work (1)), release throttling arrangement 26b closing (work (2)), then, by the 2nd refrigeration Agent flow passage selector device 28b is switched to refrigeration side (work (3)).
It is not (S6 in the case that many pumps 31 are operated in S6；It is no), the end pump rotation operating of control device 50 control 1, 2。
In addition, the ratio changed to the operating number of pump 31 is that can for example be conveyed in thermal medium circulation loop B Thermal capacity less than 50%.But, the ratio changed on the operating number to pump 31, dependent on for conveying hot Jie Lift and flow that the pump 31 of matter can be played, so as to be not limited to less than 50%.For the lowest stream that can be played of 2 pumps 31 While amount and the difference of necessary indoor load are compared, stated in order to which the flow velocity in thermal medium circulation loop B does not cause from above The risk of pipe arrangement pitting is, it is necessary to cautiously select flow now caused by bright excessive flow velocity.
In addition, as shown in figure 13, in the case that the load of connection indoor unit 3 is small, disclosure satisfy that in connection indoor unit 3 Necessary load thermal medium flow under total input value of pump 31 make pump 31a, the situation of pump 31b both sides driving and making pump 31 Any one party driving in the case of be different.The ratio changed accordingly, with respect to the operating number to pump 31, except figure Beyond 10 control process, it is also contemplated that the content of the Figure 13 is, it is necessary to the platform of selected optimal pump 31 corresponding with each indoor load Number.
Moreover, make pump 31 number of units reduce in the case of, it is desirable to have selectively stop pump 31a or pump 31b any one party Only.For example, using the control device 50 in conditioner 100, after the total driving time for storing pump 31a and pump 31b, with The timing of the operating number reduction of pump 31 stops the pump 31 of a side of total driving time length, thus, makes total drive of the both sides of pump 31 Dynamic time homogenization.It is however not limited to which this, is set with being connected the operating condition of indoor unit 3, pump 31a, pump 31b each Pump specification switch benchmark accordingly.
In addition, in the case of making the number of units of pump 31 increased, for the feelings of so far pump 31a or pump 31b any one party operating Condition, as number of units increases, the flow in thermal medium circulation loop B may sharp rise.Thus, increase the number of units of pump 31 In the case of, in addition to the pump 31 so far driven, both sides are can convey stable flow most in increased pump 31 Low discharge drives.
Moreover, in the case where making the number of units reduction of pump 31, while the flow-reduction of thermal medium, not to being connected with stopping Pump 31 thermal medium between heat exchanger 25 conveying thermal medium.Thus, on flowing into the heat source side system of heat exchanger 25 between the thermal medium Cryogen, similarly closes the refrigerant of inflow, for heat exchanger 25 between the thermal medium without heat exchange, can avoid wave The inflow of the refrigerant taken.Moreover, the timing ratio for closing the heat source side refrigerant of inflow makes heat exchanger 25 between inflow thermal medium Thermal medium closing timing advance, thereby, it is possible to avoid changing because between thermal medium caused by the heat absorption that heat source side refrigerant is brought The risk that thermal medium in hot device 25 freezes.
In addition, make pump 31 number of units it is increased in the case of, conveyed also by increased pump 31, flow into connected heat Jie Between matter the timing of the thermal medium of heat exchanger 25 than flow into thermal medium between heat exchanger heat source side refrigerant timing advance, thus, The risk freezed by the thermal medium between thermal medium caused by the heat absorption that heat source side refrigerant is brought in heat exchanger 25 can be avoided.
[the operating switching of the pump 31 during full heating mode of operation]
Based on Figure 11, the hand-off process of the operating number of the pump 31 during on full heating mode of operation is illustrated.
In full heating mode of operation, control device 50 judges the connection of the implementation heating operation in connection indoor unit 3 The total capacity of indoor unit 3 (implements ratio of the load relative to full connection indoor unit 3 of the connection indoor unit 3 of heating operation Example) whether it is below the lower limit capacity for the thermal capacity that can be conveyed in thermal medium circulation loop B (S11).It is determined as junction chamber (the S11 when total capacity of interior unit 3 is below the lower limit capacity for the thermal capacity that can be conveyed in thermal medium circulation loop B；It is), Control device 50 makes the number of units of the pump 31 of operating reduce (S12；It is~S15).On the other hand, it is judged to connecting indoor unit 3 (the S11 when lower limit capacity of thermal capacity of the total capacity than that can be conveyed in thermal medium circulation loop B is big；It is no), control device 50 Make the number of units increase (S16 of the pump 31 of operating；No~S19).
In S12, control device 50 determines whether that many pumps 31 are operated.In the case of being determined as that many pumps 31 are operated (S12；It is), control device 50 judges the operating relative importance value (S13) of pump 31 to implement pump rotation operating control 3,4.The fortune of pump 31 Turn relative importance value for example to be determined according to the length of total driving time of pump 31.Thereby, it is possible to make the one of total driving time length The pump 31 of side stops, and can realize the homogenization of total driving time of all pumps 31.
In S13, be determined as pump 31b relative importance value it is higher than pump 31a in the case of (S13；Pump 31b), control device 50 is held Row work sequence number (5) (S14).In work sequence number (5), since the state that pump 31a, pump 31b both sides operate, make pump 31a Stop.But, throttling arrangement 26a (work (1)) is closed, pump 31a is stopped (work (2)), then, by the 1st thermal medium stream The thermal medium flow passage selector device 33 of switching device 32 and the 2nd is switched to pump 31b sides (work (3)).
In S13, be determined as pump 31a relative importance value it is higher than pump 31b in the case of (S13；Pump 31a), control device 50 is held Row work sequence number (6) (S15).In work sequence number (6), since the state that pump 31a, pump 31b both sides operate, make pump 31b Stop.But, throttling arrangement 26b (work (1)) is closed, pump 31b is stopped (work (2)), then, by the 1st thermal medium stream The thermal medium flow passage selector device 33 of switching device 32 and the 2nd is switched to pump 31a sides (work (3)).
In S12, it is determined as it not being (S12 in the case that many pumps 31 are operated；It is no), control device 50 terminates pump rotation fortune Turn control 3,4.
In S16, control device 50 determines whether that many pumps 31 are operated.It is determined as not being situation that many pumps 31 are operated Under (S16；It is no), control device 50 carries out specifying (S17) to the operating number of pump 31.
In S17, (S17 in the case of pump 31b operatings is appointed as；Pump 31b), control device 50 performs work sequence number (7) (S18).In work sequence number (7), since the state that pump 31a stops, make pump 31a, pump 31b both sides operating.But, by the 1st The thermal medium flow passage selector device 33 of thermal medium flow passage selector device 32 and the 2nd is switched to pump 31a and the (work of pump 31b both sides side (1)), make pump 31a, pump 31b both sides driven at low speed (work (2)), then, release throttling arrangement 26a closing (work (3)).
In S17, (S17 in the case of pump 31a operatings is appointed as；Pump 31a), control device 50 performs work sequence number (8) (S19).In work sequence number (8), since the state that pump 31b stops, make pump 31a, pump 31b both sides operating.But, by the 1st The thermal medium flow passage selector device 33 of thermal medium flow passage selector device 32 and the 2nd is switched to pump 31a and the (work of pump 31b both sides side (1)), make pump 31a, pump 31b both sides driven at low speed (work (2)), then, release throttling arrangement 26b closing (work (3)).
In S16, (S16 in the case that many pumps 31 are operated；It is), control device 50 terminates pump rotation operating control 3,4.
In addition, the ratio changed to the operating number of pump 31 is that can for example be conveyed in thermal medium circulation loop B Thermal capacity less than 50%.But, the ratio changed on the operating number to pump 31, dependent on for conveying hot Jie Lift and flow that the pump 31 of matter can be played, so as to be not limited to less than 50%.For the lowest stream that can be played of 2 pumps 31 While amount and the difference of necessary indoor load are compared, with the mistake that the flow velocity in thermal medium circulation loop B is described above The risk for the pipe arrangement pitting that big flow velocity is brought is, it is necessary to cautiously select flow now.
In addition, as shown in figure 13, in the case that the load of connection indoor unit 3 is small, disclosure satisfy that in connection indoor unit 3 Necessary load thermal medium flow under total input value of pump 31 make pump 31a, the situation of pump 31b both sides driving and making pump 31 Any one party driving in the case of be different.Accordingly, with respect to the ratio of the operating number of change pump 31, except Figure 11 control Beyond system processing, it is also contemplated that the content of the Figure 13 is, it is necessary to the number of units of selected optimal pump 31 corresponding with each indoor load.
Moreover, make pump 31 number of units reduce in the case of, it is desirable to have selectively stop pump 31a or pump 31b any one party Only.For example, using the control device 50 in conditioner 100, after the total driving time for storing pump 31a and pump 31b, with The timing of the operating number reduction of pump 31 stops the pump 31 of a side of total driving time length, thus makes total driving of the both sides of pump 31 Time uniforms.But, it is not so limited, sets respective with the operating condition for being connected indoor unit 3, pump 31a, pump 31b Pump specification switches benchmark accordingly.
In addition, in the case of making the number of units of pump 31 increased, for the feelings of so far pump 31a or pump 31b any one party operating Condition, with number of units increase, the flow in thermal medium circulation loop B may steeply rise.Thus, the increased feelings of number of units of pump 31 are made Under condition, in addition to the pump 31 so far driven, in increased pump 31, both sides are with the lowest stream for the flow that can convey stabilization Amount driving.
Moreover, make pump 31 number of units reduce in the case of, while the flow-reduction of thermal medium, for being connected with stopping Heat exchanger 25, does not convey thermal medium between the thermal medium of pump 31.Thus, on flowing into the heat source side system of heat exchanger 25 between the thermal medium Cryogen, similarly closes flowed into refrigerant, can accordingly, for heat exchanger 25 between the thermal medium without heat exchange Avoid the inflow of refrigerant wasted.Moreover, the timing ratio for closing the heat source side refrigerant of inflow makes to change between inflow thermal medium The timing advance of the thermal medium closing of hot device 25, thereby, it is possible to avoid with caused by the radiating brought by heat source side refrigerant The temperature of thermal medium between thermal medium in heat exchanger 25 crosses a liter risk for the thermal medium circulation loop parts damages produced.
In addition, in the case of making the number of units of pump 31 increased, being conveyed by increased pump 31, connected heat Jie is flowed into Between matter the timing of the thermal medium of heat exchanger 25 than flow into thermal medium between heat exchanger heat source side refrigerant timing advance, thus, The temperature mistake with the thermal medium between thermal medium caused by the radiating brought by heat source side refrigerant in heat exchanger 25 can be avoided Rise the risk of the thermal medium circulation loop parts damages produced.
1st thermal medium flow passage selector device 32 of conditioner 100 and the 2nd thermal medium flow passage selector device 33 are combined The two portions of the part of opening and closing of the carry out two-way stream of part and open and close valve using the switching three-way stream of triple valve etc. etc. Part etc., to switch stream.Mixing valve alternatively, it is also possible to combine stepping motor driving type etc. makes the flow of threeway stream Part both parts for the changes in flow rate for making two-way stream of the part and electronic expansion valve of change etc. etc., are used as the 1st heat The thermal medium flow passage selector device 33 of medium flow passage selector device 32 and the 2nd.In this case, additionally it is possible to prevent opening suddenly by stream Close caused water hammer.Moreover, in the present embodiment, being carried out in case of thermal medium flow adjuster 34 is two-port valve Explanation, but as the control valve with threeway stream, can also set in the lump makes the bypass pipe using the bypass of side heat exchanger 35.
In addition, thermal medium flow adjuster 34 uses the stream that can control to flow in stream with stepping motor driving type The part of amount, no matter two-port valve can or enclose the triple valve of one end.Filled in addition, being adjusted as thermal medium flow 34 are put, open and close valve etc. can also be used to carry out the part of the opening and closing of two-way stream, ON/OFF is repeated and opens control average discharge.
In addition it is shown that the 2nd cold-producing medium stream circuit switching device 28 is the situation of four-way valve, but not limited to this, using multiple Two-way flow channel switching valve or threeway flow channel switching valve, refrigerant can also similarly flow.
In addition, being only connected in the case of 1, certainly using side heat exchanger 35 and thermal medium flow adjuster 34 Similarly set up, moreover, as heat exchanger between thermal medium 25 and throttling arrangement 26, even if setting multiple portions for implementing identical work Part, has no problem certainly.Moreover, thermal medium flow adjuster 34 is said in case of being built in relay unit 2 It is bright, but not limited to this, indoor unit 3 can also be built in, relay unit 2 and indoor unit 3 can also be constituted to split.
As thermal medium, mixed liquor, water and the anti-corrosion of such as refrigerating medium (anti-icing fluid), water, refrigerating medium and water can be used Lose high mixed liquor of additive of effect etc..Therefore, in conditioner 100, though thermal medium via indoor unit 3 to The interior space 7 is revealed, due to the material that thermal medium is safe to use, so contributing to the raising of security.
In the present embodiment, it is illustrated in case of conditioner 100 includes memory 19, but Memory 19 can be not provided with.In addition, in general, wind is provided with heat source side heat exchanger 12 and using side heat exchanger 35 Machine, promotes the situation of condensation or evaporation more by blowing, but not limited to this.Can also using side heat exchanger 35 for example, being used as Using the baffle heater using radiation, can also be used as heat source side heat exchanger 12 moves heat by water or anti-icing fluid Water-cooled part.That is, as heat source side heat exchanger 12 and side heat exchanger 35 is utilized, as long as it can radiate or inhale Heat construction part, no matter species, can use.
In the present embodiment, it is illustrated, but is not had to number in case of being 4 using side heat exchanger 35 It is particularly limited to.In addition, be illustrated so that heat exchanger 25b is 2 situations between heat exchanger 25a, thermal medium between thermal medium as an example, when Right not limited to this, as long as thermal medium can be cooled down and/or heated, is set several all right.Moreover, pump 31a, pump 31b are not limited respectively In one, the pump of multiple low capacities can also be connected in parallel.
More than, the conditioner 100 of present embodiment is in the conditioner with multiple pumps 31, in list Under one operation mode, connect the load of indoor unit 3 it is fully small in the case of, a pump 31 is not worked, and make others Pump 31 works, and is transported to the thermal medium that heat exchange has been carried out with heat source side refrigerant from there through consumption electric power as small as possible The indoor unit 3 connected, while continuing cooling operation or heating operation, can be avoided caused by the increase of thermal medium flow velocity The risk of pipe arrangement pitting, it is possible to increase energy saving, security.
The explanation of reference
In 1 outdoor unit, 2 relay units, 3 indoor units, 3a indoor units, 3b indoor units, 3c indoor units, 3d rooms In unit, 4 refrigerant pipings, 4A refrigerant connecting pipings, 4B refrigerant connecting pipings, 5 pipe arrangements, 6 exterior spaces, Room 7 Space, 8 spaces, 9 buildings, 10 compressors, 11 the 1st cold-producing medium stream circuit switching devices, 12 heat source side heat exchangers, 13a check-valves, Between heat exchanger between 13b check-valves, 13c check-valves, 13d check-valves, 19 memories, 20 bypass pipes, 25 thermal mediums, 25a thermal mediums Heat exchanger between heat exchanger, 25b thermal mediums, 26 throttling arrangements, 26a throttling arrangements, 26b throttling arrangements, 27 opening and closing devices, 28 the 2nd Cold-producing medium stream circuit switching device, the cold-producing medium stream circuit switching devices of 28a the 2nd, 28b cold-producing medium stream circuit switching devices, 29 opening and closing devices, 31 pumps, 31a pumps, 31b pumps, 32 the 1st thermal medium flow passage selector devices, the thermal medium flow passage selector devices of 32a the 1st, the heat of 32b the 1st is situated between Mass flow circuit switching device, the thermal medium flow passage selector devices of 32c the 1st, the thermal medium flow passage selector devices of 32d the 1st, 33 the 2nd thermal mediums Flow passage selector device, the thermal medium flow passage selector devices of 33a the 2nd, the thermal medium flow passage selector devices of 33b the 2nd, the thermal medium streams of 33c the 2nd Circuit switching device, the thermal medium flow passage selector devices of 33d the 2nd, 34 thermal medium flow adjusters, 34a thermal mediums flow adjustment dress Put, 34b thermal medium flow adjusters, 34c thermal medium flow adjusters, 34d thermal medium flow adjusters, 35 utilize side Heat exchanger, 35a utilizes side heat exchanger, and 35b utilizes side heat exchanger, and 35c utilizes side heat exchanger, and 35d utilizes side heat exchanger, 40 temperature Sensor, 40a temperature sensors, 40b temperature sensors, 50 control devices, 100 conditioners, A refrigerant circulations are returned Road, B thermal medium circulation loops.

Claims (8)

1. a kind of conditioner, has：
Refrigerant circulation loop, the refrigerant circulation loop be by refrigerant piping connect compressor, heat source side heat exchanger, The refrigerant side stream of heat exchanger, multiple refrigerants of switching refrigerant circulating path between multiple throttling arrangements, multiple thermal mediums Flow passage selector device, make heat source side refrigerant circulation；
Thermal medium circulation loop, the thermal medium circulation loop be by thermal medium convey pipe arrangement connection respectively with the multiple heat Between heat exchanger is arranged in correspondence between medium multiple thermal medium conveying devices, multiple utilization sides heat exchanger, the multiple thermal medium The thermal medium effluent road of heat exchanger, circulate thermal medium；
And control device,
Between the thermal medium in heat exchanger, the heat source side refrigerant and the thermal medium carry out heat exchange,
Characterized in that,
The control device is configured to when all operatings, the heat of utilization side heat exchanger of the multiple thermal medium conveying device When exchange capacity is turned into below the lower limit capacity for the thermal capacity that can be conveyed in the thermal medium circulation loop,
Before at least 1 in making the multiple thermal medium conveying device stops, making the thermal medium for being connected to be stopped The refrigerant side stream of heat exchanger is closed between the thermal medium of conveying device, then, makes the multiple thermal medium conveying device In at least 1 stopping,
The thermal capacity needed is conveyed to utilization side heat exchanger using the remainder in the multiple thermal medium conveying device.
2. conditioner as claimed in claim 1, it is characterised in that
The control device is configured to when the heat exchange amount of utilization side heat exchanger becomes than being recycled back in the thermal medium When the lower limit capacity for the thermal capacity that can be conveyed in road is big,
Make after the work for the thermal medium conveying device that stopped starts again, to make the thermal medium conveying for being connected to the stopping The refrigerant side stream of heat exchanger is opened between the thermal medium of device.
3. conditioner as claimed in claim 1, it is characterised in that have：
The full heating mode of operation that heat exchanger all plays a role as condenser between the thermal medium；
The full cooling operation pattern that heat exchanger all plays a role as evaporator between the thermal medium；
Between the thermal medium part for heat exchanger played a role as condenser and between the thermal medium heat exchanger a part The cooling and warming operating mixing operation mode played a role as evaporator,
The control device is provided in the full heating mode of operation and the full cooling operation pattern,
When the heat exchange amount of utilization side heat exchanger turns into the thermal capacity that can be conveyed in the thermal medium circulation loop When below lower limit capacity,
Perform the control of the stopping of at least 1 in the multiple thermal medium conveying device.
4. conditioner as claimed in claim 2, it is characterised in that have：
The full heating mode of operation that heat exchanger all plays a role as condenser between the thermal medium；
The full cooling operation pattern that heat exchanger all plays a role as evaporator between the thermal medium；
Between the thermal medium part for heat exchanger played a role as condenser and between the thermal medium heat exchanger a part The cooling and warming operating mixing operation mode played a role as evaporator,
The control device is provided under the full heating mode of operation and the full cooling operation pattern,
When the heat exchange amount of utilization side heat exchanger is than under the thermal capacity that can be conveyed in the thermal medium circulation loop When limited capacity amount is big,
Perform the thermal medium conveying device that stopped start again control.
5. the conditioner as described in claim 1 or 3, it is characterised in that
The control device is configured to the flow that can be supplied according to the multiple thermal medium conveying device, is situated between in the heat The Peak Flow Rate and heat exchange amount of the thermal medium circulated in matter circulation loop are handed over relative to the total heat of utilization side heat exchanger The ratio for the amount of changing determines to perform the timing of the stopping control of at least 1 in the multiple thermal medium conveying device.
6. the conditioner as described in claim 2 or 4, it is characterised in that
The control device is configured to the flow that can be supplied according to the multiple thermal medium conveying device, is situated between in the heat The Peak Flow Rate and heat exchange amount of the thermal medium circulated in matter circulation loop are handed over relative to the total heat of utilization side heat exchanger The ratio for the amount of changing determines to perform the timing for starting to control again of the thermal medium conveying device that stopped.
7. such as conditioner according to any one of claims 1 to 4, it is characterised in that
The refrigerant circulated in the refrigerant circulation loop uses unitary system cryogen, near azeotropic mixed refrigerant, non-azeotrope Mix refrigerant, comprising the refrigerant including natural refrigerant with two phase changes, as appointing in postcritical refrigerant 1 kind of meaning or any mixture of more than two kinds.
8. such as conditioner according to any one of claims 1 to 4, it is characterised in that
The thermal medium circulated in thermal medium circulation loop using anti-icing fluid, water, the mixed liquor of anti-icing fluid and water or to they It with the addition of thermal medium formed by the high additive of anticorrosion ability.
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